Tag: Perseverance

Perseverance peers towards the rim of Jezero Crater

12:17 pm

Perseverance peers through winter haze
Click for full image.

Overview map
Click for interactive map.

In our second cool image from Mars today, the Mars rover Perseverance gives us its own long distance view of the dusty winter air inside Jezero Crater. The photo above, cropped and reduced to post here, was taken on June 16, 2022 by the rover’s left high resolution camera, and looks to the southwest towards the crater’s western rim.

As with today’s previous cool image from Curiosity, we can see several ranges, each with distance faded more by the dust that hangs in the air during the winter on Mars. In the foreground right is the nearest cliff of the delta that flowed into Jezero over time in the past. Next is a knob and ridge line, also part of that delta flow but farther away. Third are some farther ridges that might have been part of that flow but maybe not.

Faintest of all are the highest mountains that form the western ridge of Jezero Crater, barely visible in the haze.

The blue dot in the overview map to the right marks Perseverance’s approximate position when the photo was taken. The yellow lines my guess as to the area covered by the photo. The green dot marks Ingenuity’s present position after its last flight, much closer to the delta that I had predicted.

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Ingenuity successfully completes its 29th flight on Mars

3:51 pm

Ingenuity's 29th flight, estimated

Based on this tweet posted yesterday, Ingenuity has successfully completed its 29th flight on Mars, placing it in “a better communication position with the rover.”

According to the helicopter’s flight log, the flight lasted about 66 seconds, was about 587 feet long, and had a maximum altitude of 33 feet.

On the overview map to the right the green dot marks Ingenuity’s position before the flight. The yellow line is my guess as to the approximate flight path for this 29th flight. In this new position the helicopter is better aligned with the hollow that Perseverance will climb (as indicated by the red dotted line), and will therefore also have better line of sight communications with it.

The flight itself tells us that the engineers have not only gotten the helicopter recharged, they have developed new flight software to compensate for the loss of a sensor that was used to determine Ingenuity’s elevation.

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Perseverance gets close to its first cliff

9:55 am

Perseverance's first cliff
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Time for some cool images from Perseverance! The rover, now on Mars for more than a year, has finally begun its journey up the delta of material that some time in the past flowed through a gap in the rim of Jezero Crater. In doing so, it has also finally got close to a nearby cliff, within fifty feet or so, and used its high resolution left mast camera (mastcam) to take the photos to the right. The first, cropped and reduced to post here, was a wider shot taken on June 10, 2022, with the red arrow pointing to the part of the cliff featured in the second image below, taken on June 12, 2022, after the rover had moved in closer. This second photo is also cropped and reduced to post here.
» Read more

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A rock stows away on Perseverance

10:24 am

Perseverance's stowaway
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Since early February the Mars Rover Perseverance has been toting with it a small rock in its front left wheel, as shown in the image to the right, cropped and reduced to post here and taken by the rover’s left hazard avoidance camera on February 6, 2022.

From an update today by the Perseverance science team:

Back on sol 341— that’s over 100 sols ago, in early February— a rock found its way into the rover’s front left wheel, and since hitching a ride, it’s been transported more than 5.3 miles (8.5 km). This rock isn’t doing any damage to the wheel, but throughout its (no doubt bumpy!) journey, it has clung on and made periodic appearances in our left Hazcam images.

You can see the most recent photo of the rock, taken on May 26, 2022, here. It is very clear that the rock’s repeated tumbling inside the wheel well has worn away its sharp edges as well as reduced its overall size. Given enough time its surface could even become somewhat smooth.

As the update notes, when this rock finally drops off it will create a potential mystery for future geologists, who if they are not aware that Perseverance moved it, will wonder how it got where it was, being geologically out-of-place in its new location.

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MAVEN returns to full operation

9:42 am

NASA announced yesterday that engineers have finally completely restored its Mars orbiter MAVEN, after a three month period when the spacecraft was in safe mode due to an attitude control problem.

To fix the problem engineers uploaded new software that allowed the spacecraft to determine its orientation in space not from its onboard inertial units, but from locking onto stars in the sky.

All instruments were healthy and successfully resumed observations; however, the spacecraft was constrained to pointing at the Earth until testing of all-stellar mode was completed, so the instruments were not oriented as they normally would be during science operations. Nevertheless, some limited science was still possible, and MAVEN even observed a coronal mass ejection impact Mars less than two days after the instruments were powered on.

Moreover, for some parts of the year it will still need its inertial units, so a fix for those time periods is still required.

Regardless, MAVEN can now resume acting as a communications relay between the Earth and the rovers on Mars, which for the past year has become its prime mission. While both rovers can communication without that relay, it is often necessary depending on a number of factors, and it also provides redundancy and a greater communications capacity.

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Engineers rethinking Ingenuity operations to keep it alive through the winter

9:07 am

The engineering team operating the Ingenuity helicopter on Mars have now determined that the cold oncoming winter temperatures on Mars are causing its systems to shut down during the night — at the edge of their designed temperature limits — and then reboot each morning, thus resetting its clock to the wrong time.

The result has been that the helicopter’s future is now definitely threatened. To address the cold winter temperatures and possibly keep Ingenuity alive, the engineers have come up with the following plan. First, they have focused on downloading from the helicopter all the remaining data still on-board, in case it shuts down permanently.

After all critical logs are transferred, the team will proceed with a recommissioning phase during which we will reestablish Ingenuity’s flight-readiness given our ongoing overnight cold-cycling. Like during the technology demonstration phase, we will perform a high-speed spin before proceeding to flight. Should Ingenuity receive a clean bill of health, we would be ready to execute a short sortie to the southwest in Flight 29. This flight will improve our radio link for approximately the next four to six months while Perseverance samples at the river delta.

In the meantime, the Ingenuity flight software team will be preparing a series of upgrades to enable advanced navigation features. These new capabilities will help Ingenuity ascend the river delta and continue its missions as a forward scout for Perseverance past winter.

All this effort will carry much greater risk, especially because Ingenuity is now operating far beyond its original planned capabilities, and the worst and coldest winter temperatures are yet to come. For the next three months or so the amount of sunlight available will be insufficient to power it as planned, and thus it will face a possibility of permanent failure almost every day. That 29th flight is thus likely critical to survival.

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Perseverance’s upcoming travel plans

10:12 am

Overview map
Click for interactive map.

Today’s update from the Perseverance’s science team provided a rough outline of their travel and drill-sampling plans for the Mars rover in Jezero Crater as it begins its climb up onto the delta that once poured into the crater. The route they plan to travel initially is dubbed Hawksbill Gap.

At Hawksbill Gap, however, we may instead carry out the first portion of the sampling sol path (which includes abrasion and collecting observations using our proximity science instruments) at up to 5 locations along our ascent. After that, we’ll turn around and begin a descent back down Hawksbill Gap and collect rock core samples at 3 of our abrasion locations.

This modified sampling strategy is intended to provide the team with valuable contextual information as we climb Hawksbill Gap and interpret the delta stratigraphy around us. With proximity science data in-hand, we can down-select our sampling sites to ensure we’ll be collecting the most scientifically valuable cores along our descent. Of course, we still maintain the option of collecting sample cores at any point during our ascent, if the team decides a particular abrasion site warrants immediate sampling.

The map above shows my guess (the red dotted lines) as to their potential routes uphill. As the science team has so far not published a map indicating exactly where Hawksbill Gap is, I can only guess at this point. The blue dot indicates Perseverance’s present position, the green dot Ingenuity.

As for the helicopter, there is no word yet whether the engineers have successfully gotten its batteries back to full charge. Until then, it cannot fly, and is also at risk of freezing up in the cold Martian winter.

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Pointy rocks on Mars

11:45 am

Pointy rocks as seen by Curiosity
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Pointy rocks as seen by Perseverance
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We have two cool images today from both of America’s rovers on Mars, each of which illustrates the alien nature of the red planet.

First on the right, cropped, reduced, and sharpened to post here, is a close-up taken by Curiosity’s high resolution camera on May 14, 2022 of the rightmost jagged boulder in yesterday’s navigation panorama. The number of layers is astonishing, though hardly a unique phenomenon as seen by Curiosity in its travels. Each likely marks one of many climate and geological cycles, each laying down another unique stratum for a relatively short period of geological time. Some might be volcanic ash or lava layers. Some might be layers caused by climatic changes.

The ability of these thin layers to extend outward so much, almost like they were floating, illustrates the weak Martian gravity, as well as the thinness of its atmosphere. On Earth, if the wind and weather didn’t cause these flakes to break, the gravity would.

Second on the right, cropped and sharpened to post here, is a high resolution photo taken by Perseverance on May 15, 2022 of one of the cliff faces seen by the rover looking up into the delta in Jezero Crater. Here again we see many layers and jagged, pointy rocks, illustrating again the many cycles in the past that formed the delta as it flowed into the crater.

The smoothness on the surface of the leftmost pointy rock suggests that it has stood in this position for a long very time, allowing the wind of Mars’ very thin atmosphere to erode its rough surface.

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Ingenuity in trouble

8:38 am

The engineering team yesterday revealed that several days earlier the Mars helicopter failed to communicate with the rover Perseverance as scheduled, now believed to have been caused by “a low-power state.”

Data downlinked indicates that the communications dropout on May 3, Sol 427 of the Perseverance rover’s mission at Mars, was a result of the solar-powered helicopter entering a low-power state, potentially due to the seasonal increase in the amount of dust in the Martian atmosphere and lower temperatures as winter approaches. The dust diminishes the amount of sunlight hitting the solar array, reducing Ingenuity’s ability to recharge its six lithium-ion batteries. When the battery pack’s state of charge dropped below a lower limit, the helicopter’s field-programmable gate array (FPGA) was powered down.

This state then caused the helicopter’s clock to get out of sync with the clock on Perseverance, so that when the rover tried to communicate the helicopter was not listening.

Engineers regained communications on May 5th, but the helicopter remains in trouble. Its batteries are no longer fully charged, which means it doesn’t have enough power to heat Ingenuity through the longer cold nights of winter that presently exist in Jezero crater.

The engineers have established a plan to get the batteries back up to full charge, but it means the heaters will no longer attempt to warm the helicopter as much. The result could be damaged parts not able to withstand those colder temperatures.

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Navigating a rover on Mars

9:32 am

16 photos taken by Perseverance's right navigation camera on May 2, 2022

Overview map
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Cool image time! The photo to the right is actually a screen capture of 16 consecutive photos taken on May 2, 2022 by the right navigation camera on the Mars rover Perseverance.

The overview map below gives the context. The red dot marks Perseverance’s position when the photos were taken. The green dot marks Ingenuity’s position. The small white dot marks the spot where the rover’s parachute landed. The yellow lines indicate I think the area covered by the sixteen navigation images.

There is a reason for showing this panorama in this somewhat crude form. The engineers who run Perseverance have programmed its navigation cameras to send back its pictures so that they immediately line up in this coherent pattern. There is no need to rearrange them upon arrival. The engineers thus can instantly see how each picture relates to the others, and thus get an immediate sense of the nearby terrain in which they must plot the rover’s next move.

Perseverance is now in its second science campaign, focused on studying the base of the delta. As the science team studies the delta’s cliff face, they are also studying the best route to continue uphill. To do both, they have begun slowly moving along that face, going from west to east.

The rough panorama above thus shows them the ground ahead as they continue that traverse. I expect the rover’s next move will be to the northeast, once again moving along the base of the nearest cliff. The panorama shows that while the ground in this area has a few ridges, none are so high as to cause Perseverance any problems.

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Ingenuity photographs Perseverance’s abandoned parachute on 26th flight

10:05 am

Perseverance's parachute, as photographed by Ingenuity
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Overview map
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In the past week the Mars helicopter Ingenuity successfully completed its 26th and 27th flights, with the first specifically planned to fly over the parachute that had been used by Perseverance when it landed on Mars on February 18, 2021. The first photo to the right, enhanced, cropped, and reduced to post here, is the color photo of that parachute that Ingenuity took during that flight on April 20th. Near the top of the frame you can also see the equipment used to attach the chute to the rover. The photo looks to the southwest.

The map to the right indicates the flight paths for both hops, both slightly more than 1,000 feet total. The green dot marks Ingenuity’s position yesterday, the red dot Perseverance’s position. The small white dot indicates the parachute’s location.

On April 8th Perseverance had snapped a picture of the parachute, from the position indicated by the black dot. Since that photo was taken from a distance, it could not show much. Ingenuity’s more recent photo from overhead however captures the chute quite clearly, and suggests that in the year since landing the weak Martian wind has shifted its edges slightly while depositing some dust on its surface.

You can see the changes at the edges by comparing Ingenuity’s picture with a photo taken on February 19, 2021 by Mars Reconnaissance Orbiter (MRO). In Ingenuity’s picture the near edge of the parachute especially appears to have become bunched up over time, suggesting the prevailing and strongest winds have come from the south.

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Perseverance captures solar eclipse by Phobos

1:40 pm

Phobos eclipse the Sun
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Cool movie time! The photo to the right, cropped to post here, shows the Sun partly blocked by the Mars’ moon Phobos, taken by the high resolution camera on Perseverance on the surface of Mars. Below I have embedded the full movie compiled from the images taken as Phobos moved across the Sun’s face. From the caption:

It’s long been known that Phobos is drifting toward the Martian surface year by year; tens of millions of years from now, it is expected to crash into the planet or fragment into chunks that will impact the planet. Studying Phobos’ orbit also allows scientists to refine predictions of when the doomed moon will crash into Mars.

Unfortunately, the website does not say when this solar eclipse occurred. The spots on the lower left of the Sun’s face are sunspots.
» Read more

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Perseverance spots its parachute

11:50 am

Perseverance spots its parachute
Click for full resolution. Original images found here and here.

Overview map
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Cool image time! Today the Perseverance science team released two photos taken on April 6th that captured the parachute that the rover had used to land on Mars on February 18, 2021. The enhanced panorama above is from those images. The white feature near the center is the parachute. The mountains in the distance are the southern rim of Jezero Crater, about 40 miles away.

The overview map to the right gives the context. The red dot is Perserverance’s location as of yesterday, on sol 413. The black dot marks its location on April 6th, when it took the pictures. The green dot marks Ingenuity’s present position. The yellow lines indicate the approximate area covered by the panorama.

Ingenuity had not completed its 25th flight until April 8th, two days after these photos were taken, so it isn’t actually just off the edge of these photos, it is beyond the near ridgeline out of sight.

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Ingenuity completes 25th flight, the longest yet

10:51 am

Overview map
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On April 8th the Mars helicopter Ingenuity successfully completed its 25th flight on Mars, traveling 2,310 feet at 18 feet per second while flying for 161.3 seconds.

The long distance was designed to take it out from the rough region dubbed Seitah and near the delta that is the prime geological target of the rover Perseverance.

The overview map shows the location of both rover and helicopter as of today. The red dot is Perseverance, the green dot is Ingenuity. The rover has now completed its entire planned travels, as announced in June 2021. Where it goes next has not as yet not been announced. According to the team, they plan to use Ingenuity to scout out possibly routes up onto the delta. This likely means the rover will likely spend some time at the base of the delta, getting as much data as it can, while Ingenuity does this scouting work.

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Perseverance arrives at Three Forks at the base of Jezero Crater’s delta

12:01 pm

Panorama of delta in Jezero Crater
Original images found here, here, here, and here. Click for full resolution.

Overview map
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Cool image time! The panorama above was created from four navigation camera images taken by the Mars rover Perseverance on April 10th. Because the lens on Perseverance’s navigation cameras produce slightly curved images which are taken in pairs, the panorama is made of two parts, each a pair perfectly matched images looking from a different angle. I have overlapped the pairs but as you can see, the match at the center is imperfect. While this does not produce a single smooth image, the two paired panoramas show the foot of the entire delta that had flowed into Jezero crater in the past and is the prime geological target of the rover. What is it made of? What caused it to flow into the crater? When did it do it? How was Mars different when it did so? Was the crater wet? Was the delta mud when it flowed, or was it sediment under water, pushed out by that flowing water?

The location map to the right is taken from the “Where is Perseverance?” webpage but annotated to show the planned routes of both Perseverance and Ingenuity, as shown by the tan dashed lines. The red dot marks Perseverance present location, the green dot Ingenuty’s. The yellow lines the approximate area covered by the panorama.

What next? Expect Perseverance to move as close to the base of the delta’s cliff as possible and spend at least several months studying it. Ingenuity meanwhile will be flown to the west to scout the various hollows that are potential routes for Perseverance to climb up onto the delta.

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Ingenuity completes its 24th flight on Mars

9:14 pm

Overview map
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Ingenuity today completed its 24th flight on Mars, traveling a short 33 feet for 69.5 seconds in order to place it in a good position for an upcoming record-setting 25th flight.

With Flight 24 in our log book, it is now time to look forward to our upcoming effort that charts a course out of Séítah. Flight 25 – which was uplinked yesterday – will send Ingenuity 704 meters to the northwest (almost 80 meters longer than the current record – Flight 9). The helicopter’s ground speed will be about 5.5 meters per second (another record) and we expect to be in the rarefied Martian air for about 161.5 seconds.

The red dot on the map to the right indicates Perseverance’s present position. The green dot shows where Ingenuity landed today. The tan dashed lines indicate the planned routes for both. Ingenuity’s next flight will take it out of the rough terrain of Seitah and much closer to Three Forks.

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Ingenuity completes 23rd flight on Mars

11:05 pm

Overview map
Click for interactive map.

JPL announced tonight in a tweet that Ingenuity today completed its 23rd successful flight on Mars.

23 flights and counting! #MarsHelicopter successfully completed its 23rd excursion. It flew for 129.1 seconds over 358 meters [1,175 feet].

The overview map to the right was taken from the “Where is Perseverance?” webpage and annotated by me to show the planned future routes of both Perseverance and Ingenuity. The white dotted line shows Perseverance’s path, now having almost circled the rough ground on its way to the delta and Three Forks. The tan dotted line indicates Perseverance’s future route. The dashed pink and green lines indicate two possible future flight paths for Ingenuity.

The green dot marks the position the science team marked on the map for where Ingenuity landed after today’s flight. They have not yet calculated the actual flight path, which is why it is shown by the tan dashed line. This also means there is as yet some uncertainty about this landing spot.

Originally, the plan had been to get to this spot in one flight. For reasons not yet explained, when the helicopter took off on its 22nd flight during the March 19-20th weekend, it stopped after only about 100 feet. Today’s flight apparently completed the plan, putting the helicopter where it was supposed to be.

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Ingenuity completes 22nd flight; Perseverance on a roll

11:37 am

Overview map
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According to a tweet from JPL on March 21, 2021, Ingenuity successfully completed its 22nd flight on Mars during the March 19-20th weekend, flying for 101 seconds at a height of about 30 feet.

The tweet provided no other information, other than another flight might occur as early as later this week.

However, the most recent map update from the rover/helicopter science teams, shown to the right and annotated to post here, tells us what happened. The white dotted line indicates Perseverance’s travels. The tan dotted line indicated the flight path and landing spots for Ingenuity. The dashed tan lines indicate the planned routes for both. The red dot marks Perseverance’s present location. The green dot marks Ingenuity’s location, after its 22nd flight.

The announced flight plan for Ingenuity’s 22nd flight is shown by the two blue dots, heading north and then making a sharp left before landing. Apparently, the helicopter either did not complete that plan, landing earlier for some reason, or the flight team had decided before takeoff to shorten the flight plan significantly.

What we do know is that the helicopter landed safely, from images downloaded on March 20th [sol 384] and from the JPL tweet. The next flight, targeting later this week, could attempt to complete the previous flight plan, or instead continue to break it up into small sections.

Meanwhile, Perseverance has been racing across the Martian surface, traveling almost as much in the past week as it had for the past year. (See the map from March 16th to compare.) Moreover, the Perseverance team shortened its planned route, cutting to the west of that large crater rather than skirting it to the east. The route taken was probably slightly rougher, but nothing the rover couldn’t handle, and it saved travel time. Apparently, the scientists running the rover are now very eager to finally get to the delta, the mission’s primary geological target.

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NASA extends Ingenuity’s mission through September ’22

9:31 am

Overview map
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NASA yesterday officially extended Ingenuity’s flight operations on Mars at least through September 2022, outlining in detail the helicopter’s hoped-for flight targets.

The map to the right shows the helicopter’s present location with the green dot, with its two possible future routes proceeding from this location indicated by dashed lines. The red dot indicates Perseverance’s present location, with its planned route from this spot indicated by the dashed lines.

Scheduled for no earlier than March 19, Ingenuity’s next flight will be a complex journey, about 1,150 feet (350 meters) in length, that includes a sharp bend in its course to avoid a large hill. After that, the team will determine whether two or three more flights will be required to complete the crossing of northwest Séítah.

Once Ingenuity crosses the rough terrain and reaches the delta, it will then be used to do more route scouting for the rover.

Upon reaching the delta, Ingenuity’s first orders will be to help determine which of two dry river channels Perseverance should take when it’s time to climb to the top of the delta. Along with routing assistance, data provided by the helicopter will help the Perseverance team assess potential science targets. Ingenuity may even be called upon to image geologic features too far afield (or outside of the rover’s traversable zone), or perhaps scout landing zones and caching sites for the Mars Sample Return program.

This ambitious plan exists because both the helicopter and its engineering team have far exceeded expectations. At the moment, there is no obvious reason why Ingenuity cannot continue to operate for years, an expectation that no one predicted.

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Ingenuity completes 21st flight on Mars

3:54 pm

Overview map
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According to a tweet today from JPL, the Mars helicopter Ingenuity has successfully completed its 21st flight on Mars, traveling 1,214 feet in two minutes and nine seconds at an average speed of 12.6 feet per second.

The red dot on the map to the right shows Perseverance’s location as of today. The green dot indicates Ingenuity’s position before the 21st flight. Since neither the Perseverance nor the helicopter teams have posted any updates describing the 21st flight, it is difficult to indicate a precise location for its landing site. All we know is that the helicopter is supposed to fly to the northwest, cutting across the rougher region while the rover follows the tan dotted line around that rough region, with both targeting the delta to the northwest.

As a guess, I have placed a black dot about 1,200 feet to the northwest.

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Ingenuity’s 20th flight a success

7:59 pm

According to a tweet released tonight by JPL, the 20th flight of Ingenuity on Mars was a success, lasting 130 seconds and traveling about 1,283 feet.

The tweet includes a short video showing the helicopter taking off and then landing, at the same spot, which I am sure is not of this flight but from a previous test that simply went up and down. The flight just completed took off and headed mostly to the north, slightly west, and landed in a different spot entirely.

Expect more information to follow.

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Ingenuity update: Dust storm caused issues; 20th flight upcoming

9:43 am

Overview map
Click for interactive map.

According to the Ingenuity engineering team in an update today, the Mars helicopter is getting ready for its 20th flight, scheduled for no earlier than today, even as the team successfully dealt with dust that settled on the helicopter’s various parts prior to flight 19.

The dust storm did, however, leave the Ingenuity team with two additional challenges to deal with: a dirty navigation camera window and dust in the swashplate assemblies.

Comparing navigation camera images taken before and after the dust storm revealed that the storm deposited debris on the ground-facing navigation camera window, specifically around the periphery of the camera’s field of view. Debris on the navigation camera window is problematic because Ingenuity’s visual navigation software may confuse the debris with the actual ground features that it tries to track during flight, which can cause navigation errors. Fortunately, Ingenuity’s software provides a tool for dealing with this issue: The team can provide an updated image mask file that tells the visual navigation software to ignore certain regions of the image. The operations team made use of this feature and performed an image mask update late last month.

The dust storm also deposited dust and sand in Ingenuity’s swashplate assemblies. On Mars as well as on Earth, a helicopter’s swashplates are very important because they control the pitch (angle from horizontal) of the rotor blades, which is essential for stable and controlled flight. Ingenuity’s swashplate issue was first detected when the rotorcraft reported a failure during its first automated swashplate actuator self-test since the dust storm on Jan. 28, 2022 (Sol 335 of the Perseverance mission). Data revealed that all six swashplate servo actuators were experiencing unusual levels of unusual levels of resistance while moving the swashplates over their range of motion.

The engineers subsequently tested a procedure, planned before launch, for cleaning the swashplates, and found that it worked.

The data from that activity showed a significant improvement – a reduction in servo loading, so the team followed it up with seven back-to-back servo wiggles on Sol 341. Remarkably, by the end of that activity, Ingenuity’s servo loads appeared nearly identical to nominal loads seen prior to the dust storm.

After dealing with both dust issues, flight 19 proceeded successfully, as planned.

The overview map above shows the present location of Perseverance as the red dot, the present location of Ingenuity by the green dot, and the approximate landing site for the helicopter’s 20th flight by the black dot. The tan dotted line shows Perseverance’s planned route.

Perseverance itself has been traveling fast since Ingenuity’s last flight on February 9th, almost completely retracing its steps to return almost to its landing site.

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Global image of Mars from UAE’s Al-Amal orbiter

10:23 am

Mars as seen by Al-Amal in January 2022
Click for original image.

Cool image time! The United Arab Emirates (UAE) today released several new images taken by its Al-Amal Mars orbiter, showing the changing atmospheric conditions on Mars between September ’21 and January ’22.

The photo to the right, cropped and annotated by me, is the January image, showing the dust storm conditions that presently exist in the equatorial regions of Mars. The lighter puffy cloud-like features in the center of the image are a 1,500 mile wide dust storm centered on the equator. The white dot indicates the approximate spot where Perseverance sits in Jezero Crater, within that storm.

The previous Al-Amal image from September (available at the link) shows the whole Martian hemisphere with generally clear skies.

Below is a recent photo taken by Perseverance illustrating these dusty conditions.
» Read more

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Ingenuity completes 19th flight

9:19 am

Perserverance and Ingenuity as of February 8, 2022
Click for interactive map.

The Mars helicopter Ingenuity yesterday successfully completed its 19th flight on the Martian surface, traveling for 99 seconds about 200 feet to the northeast, landing close to the landing site of its 8th flight back in June 2021.

The map to the right shows the helicopter’s overall travels in tan, with the 19th flight path in green. The white line marks Perseverance’s travels, with the red dot indicating its present location. The dashed yellow line indicates the rover’s planned route. To achieve that the rover team is retracing its steps along the path it had previously traveled, with Ingenuity flying in front, along that path.

The flight had been delayed more than a month while waiting for a dust storm to settle as well as making sure Perseverance was in a good position to maintain communications throughout the flight. With Perseverance finally on the move to the east and the dust storm subsiding, the Ingenuity flight was finally possible.

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Confirmed: All debris cleared from Perseverance sample tube

8:40 am

Mosaic showing the clearing of debris
Click here and here for original images.

The Perseverance science team today announced in an update that their effort to clear the sample tube of bits of core sample has succeeded, as indicated partly by the two images above that I posted on January 19th.

According to the report, the two small pieces visible bottom center fell out after two small rotations of the carousal. Other pieces however remained, and these were removed as followed:

On Monday, Jan. 17, the team commanded another operation of the rotary percussive drill in an attempt to dislodge more material from the tube. With the tube’s open end still pointed towards the surface, we essentially shook the heck out of it for 208 seconds – by means of the percussive function on the drill. Mastcam-Z imagery taken after the event shows that multiple pieces of sample were dumped onto the surface. Is Tube 261 clear of rock sample? We have new Mastcam-Z images looking down the drill bit into the sample container that indicate little if any debris from the cored-rock sample remains. The sample tube has been cleared for reuse by the project.

The team is now discussing their next step, which could be drilling a new hole at this spot or moving on.

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Ingenuity’s 19th flight delayed due to Martian weather

9:10 am

Because of the early arrival of the fall dust storm season, the Ingenuity engineering team decided to delay the helicopter’s 19th flight on January 5th, rescheduling it to no earlier than January 23rd.

In the days following the flight delay, the dust storm moved over Jezero crater, and we were able to clearly see its effects in both MEDA data and from orbit (Figure 1). Most notable was a sharp drop in air density – about a 7% deviation below what was observed pre-dust storm. This observed decrease would have put density below the lower threshold of safe flight and would have imparted undue risk to the spacecraft. We also observed the effect of dust in the amount of sunlight absorbed by Ingenuity’s solar array, which fell well below normal “clear sky” levels, a drop of about 18%.

Apparently the storm has now dissipated, allowing the new flight date.

Though this flight postponement occurred two weeks ago, today’s update appears to be the first public announcement, which has been typical of the Ingenuity team. They generally announce planned flights just before take-off, but then provide no detailed update on what happened, sometimes for weeks.

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Debris apparently cleared from Perseverance’s sample carousel

10:12 am

Mosaic showing the clearing of debris
Click here and here for original images.

Two images taken by one of Perseverance’s cameras and downloaded today appear to show that the bits of debris from the rover’s most recent core sample that had fallen into the sample storage carousel have been dislodged and are now gone.

Those images are above, placed side by side. They were taken a little over an hour apart on January 18, 2022, probably before and after the rover completed two short rotations of the carousel, as planned.

The first image on the left, taken at 12:12:47 local solar time, shows the two small pieces sitting near the bottom inside of the sample storage holder. The second image on the right, taken at 13:20:40 local solar time, shows both pieces gone. There also appears to be less small rubble on the small platform just below this point.

The science team will next take pictures of the ground below, comparing those with pictures taken before the rotations, to see if they can spot this debris and confirm it is completely clear of the rover.

If the debris is gone, as these images suggest, Perseverance will be able to drill another core sample at this location and store it as planned. Expect an announcement by tomorrow or the next day providing more details of this success.

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The plan for clearing Perseverance’s sample carousel of debris

9:22 am

Debris in core sample carousel on Perseverance
Click for full image.

The Perseverance science team yesterday outlined the first steps in their plan to remove pieces of debris that had fallen into the core sample bit storage carousel, as shown by the picture to the right, and thus prevents them from storing further core samples.

First they have taken pictures of an area of the ground below the rover to establish a baseline. Then,

With this below-chassis, preliminary imaging, in hand, the team [will return] the remaining contents of Sample Tube 261 (our latest cored-rock sample) back to its planet of origin. Although this scenario was never designed or planned for prior to launch, it turns out dumping a core from an open tube is a fairly straightforward process (at least during Earth testing). We sent commands up yesterday, and later on today the rover’s robotic arm will simply point the open end of the sample tube toward the surface of Mars and let gravity do the rest.

This maneuver will tell them exactly how much material broke off the core when some pieces of it dropped into the carousel.

Next, on January 18th, they will have the bit carousel perform two short rotations, the first short and the second longer, to shift the debris in the carousel and get more information about it. Some might drop out with this maneuver, so they are also going to take more ground pictures to see if any did.

They have not yet outlined the next steps in this removal procedure, though they have said the need for this procedure was anticipated when the rover was designed. Thus they must know what those steps will be, but are likely holding off outlining them because they might need to revise their actions depending on what they learn in the next few days.

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Debris in Perseverance core sample equipment

9:07 am

Debris in core sample carousel on Perseverance
Click for full image.

In attempting to store its sixth core sample on Mars last week, engineers discovered that Perseverance could not do so because several small pieces of the core sample had fallen into the equipment and prevented the drilling bit with the core from inserting itself completely into the sample storage carousel.

To understand the issue precisely, the engineers commanded Perseverance to first extract the bit from the carousel so they could get pictures of it.

The extraction took place yesterday (1/6) and data was downlinked early this morning. These most recent downlinked images confirm that inside the bit carousel there are a few pieces of pebble-sized debris. The team is confident that these are fragments of the cored rock that fell out of the sample tube at the time of Coring Bit Dropoff, and that they prevented the bit from seating completely in the bit carousel.

The photo to the right shows that material at the image’s bottom.

It appears this issue was anticipated when the rover was designed giving engineers a way to remove the debris. They plan to do so, but will proceed slowly as this will be the first time it will be attempted on Mars.

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Ingenuity’s next flight and the plans beyond

1:19 pm

Overview map
Click for interactive map.

In an update posted today written by Ingenuity pilot Martin Cacan, he outlined the engineering team’s goal for the Mars’ helicopter’s next flight, its nineteenth.

This flight, which will take place no earlier than Friday, Jan. 7, takes the scout vehicle out of the South Séítah basin, across the dividing ridge, and up onto the main plateau. The precise landing target for Flight 19 is near the landing site of Flight 8. Images taken during Flight 9 by the rotorcraft’s high-resolution Return-To-Earth (RTE) camera were used to select a safe landing zone.

…Spanning 207 feet (63 meters), this flight will last about 100 seconds at a groundspeed of 2.2 mph (1 meter per second) and altitude of 33 feet (10 meters) while taking 9 new RTE images. The final act of the flight is to turn nearly 180 degrees to flip the RTE camera to a forward-facing orientation for future flights toward the river delta. [emphasis mine]

The green line in the map to the right indicates the exact path, going about 207 feet to the northeast. The red dot marks the location of Perseverance on December 8, 2021, the last time the Perseverance science team updated their map showing the rover’s travels.

The highlighted words are the most important. Cacan also said this in his update:

The current mission goal is to reach the Jezero river delta to aid the Perseverance rover in path planning and scientific discovery.

Assuming the helicopter continues to function correctly, their next flights will apparently be aimed towards the delta. Whether that path will follow the planned route marked by the dashed yellow line, or cut straight across, is not clear. If the latter, that implies they have revised Perseverance’s planned route so that it also cuts straight across from about the point of Ingenuity’s next landing site.

More likely Cacan was not speaking literally, and that the route Ingenuity will take to the delta will follow the planned route, around that crater to the northeast.

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