Tag: engineering

Pathfinder 1 communications confirmed

10:37 pm

The competition heats up: One of the smallsats launched by India’s PSLV rocket this weekend, Pathfinder 1, has successfully begun communicating with the ground as well as transmitting data.

This is a test demonstration flight of this new smallsat Earth observation imaging satellite. As the company notes,

The on-orbit demonstration of the BlackSky Pathfinder spacecraft validates the future vision of real-time global observation and understanding. Specifically, BlackSky’s Pathfinder spacecraft is unique and revolutionary in its size, cost and performance. By comparison, Digital Globe’s WorldView 4 spacecraft — which has truly impressive resolution and spectral diversity — weighs 2,500 kg and costs $750M to put on orbit. Pathfinder represents the pinnacle in rethinking spacecraft design and economics. Our spacecraft, complete with propulsion system and high gain communications, can provide high resolution (1 meter) imagery in a 50 kg package that will fit in a middle seat on a commercial airplane – all for less than $7.5M on orbit. It’s this unique combination of size, cost and performance that enables us to orbit a constellation of 60 spacecraft for less than the cost of a single Digital Globe spacecraft.

As I’ve mentioned several times in the past year, the space industry is diverging into two streams, smallsats for unmanned communications and research satellites, and big spacecraft for human exploration. Tomorrow, Elon Musk will give us his vision of the big spacecraft stream in his much hyped speech at the International Astronautical Congress.

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Rocket Lab completes construction of first launchpad

10:24 pm

The competition heats up: Rocket Lab today announced the completion of its first launch complex at its launch site in New Zealand.

Air traffic near the launch complex site is fairly sparse, which the company says will allow it to achieve the “highest frequency of launches in history,” according to a statement from the company obtained by Space.com. Peter Beck, Rocket Lab’s CEO, told Space.com in an interview that the complex is licensed to conduct a launch as frequently as every 72 hours. However, the company expects to carry out a launch about four to five times per month, he said.

The statement from Rocket Lab declared its new facility “the world’s first private orbital launch complex.” The private spaceflight company Blue Origin operates a private launch facility in Texas, but has only used that facility for suborbital flights. The private spaceflight company SpaceX has not yet completed construction on its private orbital launch facility in Texas.

They say they will begin test launches before the end of the year.

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Water plumes on Europa?

11:40 am

New data from the Hubble Space Telescope suggests that there might be active water plumes issuing from Europa that are fed by the planet’s underground ocean.

In 10 separate occurrences spanning 15 months, the team observed Europa passing in front of Jupiter. They saw what could be plumes erupting on three of these occasions.

This work provides supporting evidence for water plumes on Europa. In 2012, a team led by Lorenz Roth of the Southwest Research Institute in San Antonio, detected evidence of water vapor erupting from the frigid south polar region of Europa and reaching more than 100 miles (160 kilometers) into space. Although both teams used Hubble’s Space Telescope Imaging Spectrograph instrument, each used a totally independent method to arrive at the same conclusion.

These results are very very uncertain. As the lead scientist noted twice during the press conference, the data is at the very limits of Hubble’s capabilities. I would not be surprised at all if later observations find that it is in error.

In fact, the press conference itself was more a PR event to lobby for Hubble as well as the James Webb Space Telescope than it was a description of a new discovery. The discovery itself was given a much bigger tease than it really deserves, considering the very uncertain nature of its data. I am a big fan of Hubble, as anyone who has read anything I have written in the past two decades. Nonetheless, I find this blatant lobbying very annoying. Also very annoying will be the naive willingness of many in the press to buy into this story. Expect a lot of silly stories today and tomorrow screaming that water jets coming from Europa have been definitely photographed by Hubble.

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PSLV places multiple satellites into different orbits

8:55 am

The competition heats up: India’s space agency ISRO has successfully used its PSLV rocket to launch eight satellites into two different orbits.

After the successful separation of SCATSAT-1, the PSLV-C35 mission continued. Still carrying the seven co-passenger satellites, the fourth stage of PSLV coasted over the South polar region and then started ascending towards the Northern hemisphere. A safe distance between the orbiting SCATSAT-1 and PSLV-C35 fourth stage was maintained by suitably manoeuvring the stage.

At 1 hour 22 minutes and 38 seconds after lift-off as the fourth stage was in the North polar region, the two engines of PSLV fourth stage were reignited and fired for 20 seconds. As a result of this, it entered into an elliptical orbit measuring 725 km on one side of the Earth and 670 km on the other. And 50 minutes later, as the PSLV fourth stage was again coasting near the south pole, its engines were fired for another 20 seconds. This second firing made the fourth stage to enter into a circular orbit of 669 km height inclined at an angle of 98.2 degree to the equator. 37 seconds later, the Dual Launch Adapter was successfully separated from the PSLV-C35 fourth stage. 30 seconds after this event, ALSAT-1N was the first co-passenger satellite to be separated successfully. Following this, the NLS-19, PRATHAM, PISAT, ALSAT-1B, ALSAT-2B, and Pathfinder-1 were separated from the PSLV fourth stage in a predetermined sequence thereby successfully completing PSLV-C35 mission.

This launch was also the 36th successful PSLV launch in a row.

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SpaceX update on launchpad explosion investigation

11:49 pm

On September 23, SpaceX released an update outlining the status of its investigation into the September 1 Falcon 9 launchpad explosion.

The report noted the following:

  • The data points to “a large breach in the cryogenic helium system of the second stage liquid oxygen tank” as the source of the explosion, though what caused the breach remains as yet unknown.
  • The cause of this failure and the previous launch failure in June 2015 are not related.
  • The report summarized some of the launchpad damage, noting that while the pad itself needs extensive repairs,

    …the Falcon Support Building adjacent to the pad was unaffected, and per standard procedure was unoccupied at the time of the anomaly. The new liquid oxygen farm – e.g. the tanks and plumbing that hold our super-chilled liquid oxygen – was unaffected and remains in good working order. The RP-1 (kerosene) fuel farm was also largely unaffected. The pad’s control systems are also in relatively good condition.

  • The report also noted that, “pending the results of the investigation, we anticipate returning to flight as early as the November timeframe.”

While this report suggests they have made some progress, the fundamental cause of the explosion remains unknown.

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The outbursts on Comet 67P/C-G

9:52 am

The Rosetta science team has released a detailed analysis of the jets and outbursts that they observed coming from Comet 67P/C-G during the comet’s close approach to the Sun.

Brief but powerful outbursts seen from Comet 67P/Churyumov–Gerasimenko during its most active period last year have been traced back to their origins on the surface.

In the three months centred around the comet’s closest approach to the Sun, on 13 August 2015, Rosetta’s cameras captured 34 outbursts. These violent events were over and above regular jets and flows of material seen streaming from the comet’s nucleus. The latter switch on and off with clockwork repeatability from one comet rotation to the next, synchronised with the rise and fall of the Sun’s illumination.

By contrast, outbursts are much brighter than the usual jets – sudden, brief, high-speed releases of dust. They are typically seen only in a single image, indicating that they have a lifetime shorter than interval between images – typically 5–30 minutes. A typical outburst is thought to release 60–260 tonnes of material in those few minutes.

They have also released a new image taken by the navigation camera of Rosetta’s September 30th landing zone.

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Stratolaunch loses top executive

9:42 am

Today it was revealed that Vulcan Aerospace, the company building Stratolaunch, is losing one of its top executives.

Aerospace veteran Chuck Beames is leaving his post as president of Microsoft co-founder Paul Allen’s spaceflight company, Vulcan Aerospace. Word of Beames’ departure came from Allen in an internal email that was sent to Vulcan employees and obtained by GeekWire today. Allen said Jean Floyd, the CEO of Vulcan’s Stratolaunch Systems, will expand his role to become Vulcan Aerospace’s interim executive director as well.

Allen’s email, which you can read in its entirety at the link, also called Orbital ATK “a valued partner.” The last we had heard of this partnership, however, was that Orbital ATK had backed out of it. Allen’s email instead suggests that some renegotiations are going on, and the partnership is not quite dead.

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Russia to break safety rules to repair Soyuz capsule

9:28 am

In order to replace a burnt capsule quickly in its Soyuz capsule, Russia will ignore its own safety rules and allow the engineers to work without draining the capsule of its propellants and gases.

Sources close to investigation told RussianSpaceWeb.com that a cable located behind the cosmonaut seats inside the Descent Module of the Vehicle No. 732 had accidentally been bent severely enough to damage its insulation. As it turned out, the problem had nothing to do with the encapsulation of the spacecraft inside its payload fairing on September 15, as was initially thought.

Replacing the damaged cable is relatively straight forward, but it now has to be conducted on the vehicle fully loaded with toxic propellants and pressurized gases. Such an attempt would violate usual safety rules, but draining the spacecraft off its propellants and gases would likely be even more unprecedented and require lengthy repairs.

The big issue here is not the willingness of Roscosmos management to break its safety rules. In fact, believe it or not, those rules are possibly too strict. The repairs are taking place inside the capsule where the astronauts sit. If it is too dangerous for engineers to be there with the capsule fueled, then it would be too dangerous for the astronauts. Granted, engineers don’t usually sign up for those kinds of dangers, but then, if you are an engineer in the field of rocket science I suspect you did sign up, and expect them.

No, what is significant about this story is the bent cable and its damaged insulation, which was bad enough that the cable actually burnt, based on other reports. It suggests a variety of issues in the construction of this capsule, all of which are worrisome. First and foremost, how is it possible for insulation to break simply by bending a cable? Is the insulation that badly made? Or have they such low tolerances for the insulation (possibly to save weight) that it requires a very careful installation that in this case was done badly?

This is also only the second launch of an upgraded Soyuz capsule. Could it be that they haven’t worked out all the kinks in its design? If not, they have been making Soyuz capsules for literally decades. One would think that the people that install this wiring would know its tolerances and not make such a mistake.

I know I am being somewhat harsh here, but that harshness comes after seeing repeated quality control problems in a variety of Russian-built aerospace hardware in recent years. In the previous cases, however, the problems did not involve a manned flight. This one did, and if those same quality control problems are now showing up with Soyuz, that is a very bad thing.

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Windows 10 breaks computers

3:25 pm

Why I use Linux, part 3,332,468: A consumer organization is calling for Microsoft to compensate people for the hardware damage caused by upgrades to Windows 10.

Microsoft needs to pay compensation to customers who have suffered after upgrading to its latest operating system, consumer watchdog Which? has urged. Since the US technology firm pushed out the new software last year, it has been flooded with complaints. Customers who moved to Windows 10 experienced a slew of issues, including printers, webcams, wifi cards and speakers no longer working with their PC. Instances of lost files and email accounts no longer syncing, and, most significantly, computer encountering such significant issues customers had to pay someone to repair it were not uncommon, Which? has reported.

The consumer group surveyed views on the upgrade from over 5,500 members in June this year. Of the 2,500 users who had been upgraded to Windows 10 from an older version of Windows, more than one in ten ended up rolling back to their previous version of the operating system.

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Russian engineers locate short circuit problem on Soyuz

6:43 pm

Russian engineers have now located the short circuit that scrubbed this week’s manned Soyuz launch to ISS.

The official added that there would be no need dismantling the space carrier to fix the detected problem “as we will replace certain parts and then conduct the required tests before the launch.” Solntsev also said that the required spare parts to fix the malfunction and specialists to carry out the repair works were already present at the Baikonur space center in Kazakhstan, where the spacecraft was scheduled to take off.

Though the repair will be quick to fix, they are still sticking with the November 1st launch date, probably because any earlier slot is now taken by Orbital ATK’s Antares/Cygnus launch.

Update: The wording of a new report today, one day later than the report above, describing the problem as “a burnt cable”, is intriguing. A short circuit implies that they sensed some of the circuitry was not reading correctly and that some wiring had to be inspected and either rerouted or given more insulation. A “burnt cable” however suggests the short circuit was far worse and almost turned into a fire.

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Vandenberg wildfire expands to 12,000 acres

7:07 am

The wildfire at Vandenberg Air Force Base that caused the cancellation of an Atlas 5 launch this past weekend has now grown to over 12,000 acres.

According to officials it is now 45% under control. This map, when compared to earlier maps, shows that the expansion has all been to the west and towards ULA’s Atlas 5 and Delta 4 and SpaceX’s Falcon 9/Falcon Heavy launchpads. Essentially, all of the hillsides behind and surrounding the launchpads shown below in a picture I took back in 2015 during my photo tour of Vandenberg are now in flames.

looking south at ULA and SpaceX launch complexes

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An avalanche pile on Mars

11:41 pm

Avalanche pile on Mars

Cool image time! The Mars Odyssey science team has released this very interesting image, cropped on the right, of an avalanche debris pile formed when the large section of cliff on the left broke off and collapsed into the valley below. The valley is called Tiu Valles and is located close to Mars’ equator.

The wide spread of the debris is an indication of several things. For one, it illustrates the light Martian gravity, which allowed the debris to flow much farther than it would have on Earth.

For another, the spread of the debris pile suggests to me that the material that fell was very crumbly. It might have been able to hold together as a cliff for a long time, but when it collapsed the material broke apart almost like sand. Think of a sand castle you might have built as a kid on the beach. With a little moisture you can pack the sand to form solid shapes, but if your shape breaks apart the sand falls not as large blocks but as crumbly soft and loose sand. That is what appears to have happened here.

There is also the suggestion to me that water might have been involved somehow in this collapse. I am not a geologist so this speculation on my part is very unreliable. However, the shape of the debris pile suggests a liquid flow. The flow itself wasn’t liquid, but liquid might have somehow been involved in causing this geological event. We would need a geologist however to clarify these guesses on my part.

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Orbital ATK aims for October 9-13 Antares launch

5:35 pm

Orbital ATK and NASA have now scheduled the first Antares/Cygnus launch since the rocket’s failure in October 2014 for no earlier than October 9.

Orbital ATK is targeting Oct. 9-13 for the launch of the company’s upgraded Antares 230 rocket. Liftoff will occur from the Mid-Atlantic Regional Spaceport to send the OA-5 Cygnus spacecraft, called S.S. Alan G. Poindexter, to the International Space Station (ISS). According to a news release from the company, a more specific date and time will be selected upon completion of final operational milestones and technical reviews. Launch times on these dates range from 10:47 p.m. EDT Oct. 9 to 9:30 p.m. EDT Oct. 13 (2:47 GMT Oct. 10 to 1:30 GMT Oct. 14).

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Mars rover update: September 20, 2016

11:02 am

Opportunity comes first this time because it actually is more interesting.

Opportunity

For the overall context of Opportunity’s travels at Endeavour Crater, see this post, Opportunity’s future travels on Mars.

Having several choices on where to head, the Opportunity science team this week chose took what looks like the most daring route, heading almost due east towards the floor of Endeavour Crater. In fact, a review of their route and the images that the rover continues to take suggests that the panorama I created last week looked almost due east, not to the southeast as I had guessed. I have amended the most recent overhead traverse image, cropped and reduced below, to show what I now think that panorama was showing.
» Read more

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Update on wildfire at Vandenberg

8:34 am

Despite efforts to be rein it in, the wildfire at Vandenberg continues to burn and spread.

It has grown to include at least 5,000 acres.

The overhead image of the burn area at the link shows three launch sites. The SLC-3E site is ULA’s launchpad for the Atlas 5. The SLC-4E site is SpaceX’s launchpad at Vandenberg. The SLC-6 site was the site originally built for the space shuttle, never used, and has now been redesigned for ULA’s Delta rockets as well as payloads that need to be integrated vertically. For some close-up pictures, see my Vandenberg photo tour from 2015.

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