Radiohead – Creep
An evening pause: Performed live 1994.
Hat tip Roland.
Category: Behind The Black
Revisiting Mars’ glacier country
Click for full image.
With today’s cool image we return to what I have labeled glacier country on Mars, though this time the image shows a Martian glacial feature that while resembling vaguely such features seen on Earth, has an alienness to it that requires some explanation.
The photo to the right, cropped to post here, was taken on March 24, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The section I have focused on is the floor of a depression with a number of parallel pits, more or less aligned with the packed north-south ridges that cover the entire floor.
Normally, the north-south ridges would suggest repeated glacial flows moving to either the west or to the east. Such movement could over time, cause the ridges to separate, creating the cracks or pits that we see here. The trouble is that the slope of this depression is very unclear. In fact, the wider view below shows that this depression appears mostly enclosed, or if not it does not seem to be flowing in any particular direction.
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What really happened this past weekend in American rocketry
SpaceX’s first Starship mock-up,
January 2019
Three days ago it appeared that the past weekend would see four private Americans companies attempt to launch six different times with five different rockets from four different spaceports, all in less than two days.
Not surprisingly, things didn’t happen as planned. Of the six launches, three were rescheduled because of poor weather. First, bad weather in Kodiak, Alaska forced the new startup Astra to cancel its first attempt to complete an orbital flight with its Rocket 3.0, rescheduling to no earlier than September 10th.
Then, in Boca Chica, Texas, SpaceX twice tried on August 30th to launch its sixth Starship prototype on a 500 meter hop, both times scrubbing because of high winds. They are going to wait a few days before trying again.
Finally, in Florida SpaceX scrubbed its first Falcon 9 launch on August 30th for the same reason, rescheduling it for tomorrow, September 1st.
A fourth cancelled launch, by ULA using its Delta 4 Heavy rocket, occurred when the rocket did an automatic launch abort three seconds before liftoff. The company has not yet rescheduled as they try to figure out what caused the problem.
Two launches however did get off this weekend. both on August 30th. First the weather at Cape Canaveral cleared enough by evening for SpaceX to successfully launch a Falcon 9 rocket, putting an Argentinian satellite into orbit. Next that same evening Rocket Lab returned to flight after a July failure with the launch of its Electron rocket from New Zealand.
So, only two of six launches lifted off. While some of today’s fear-mongers and fans of misfortune would call this a sign of failure, it is nothing of the sort. If anything, it illustrates the slow maturing of American rocketry, from a technology that once only rarely could launch to one that now has the potential to dominate the world with multiple companies competing aggressively in an open free market, assuming of course that our increasingly fascist society doesn’t decide to shut it down.
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Rocket Lab successfully launches a commercial radar satellite
Capitalism in space: Rocket Lab tonight successfully resumed launches after its launch failure last month by placing a a commercial radar satellite into orbit.
This was Rocket Lab’s third successful launch in 2020, so they don’t make the leader board. The leaders in the 2020 launch race:
20 China
14 SpaceX
9 Russia
4 ULA
The U.S. now leads China 23 to 20 in the national rankings.
SpaceX successfully launches Argentina satellite
Capitalism in space: SpaceX tonight successfully launched an Argentinian radar satellite into polar orbit, the first such launch from Cape Canaveral since the 1960s.
The company also successfully landed the first stage at the Cape, completing that stage’s fourth flight. As I write this they still have two more smallsats to deploy, but it is very unlikely they will have an issue doing so.
The leaders in the 2020 launch race:
20 China
14 SpaceX
9 Russia
4 ULA
The U.S. now leads China 22 to 20 in the national rankings. With a scheduled launch by Rocket Lab from New Zealand later tonight, these numbers could change again before the day is out.
SpaceX scrubs Starship prototype hop
Capitalism in space: Though it appeared twice today that SpaceX engineers were on the verge of executing their second Starship prototype hop, the first for prototype #6, in both cases they stood down.
It appears according to road closures in Boca Chica they will try again tomorrow. The live stream is available here. The closures go from 8 am to 8 pm (Central), within which the hop could occur at almost any time, but likely not before 9 am.
August 28, 2020 Zimmerman/Batchelor
Embedded below the fold in two parts.
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SpaceX scrubs first launch today due to weather
Capitalism in space: SpaceX has scrubbed its first planned launch for today, putting 60 Starlink satellites into orbit, due to poor weather.
Assuming they get range permission, they will try again on September 1st at 9:29 am (Eastern).
Their second launch today remains on their schedule, with the weather presently giving them a 40% chance of launch.
Problem with InSight’s weather station
Engineers are troubleshooting a problem with the weather sensors on the InSight lander on Mars that has prevented them from collecting data since August 16th.
[The weather system] is in safe mode and unlikely to be reset before the end of the month while mission team members work toward a diagnosis. JPL engineers are optimistic that resetting the control computer may address the issue but need to investigate the situation further before returning the sensors to normal.
Overall InSight has turned out to be of mixed success. The seismometer has worked as planned, but the mole designed to drill the heat thermometer sixteen feet into the ground has so far failed to work, and now the weather station has shut down, though hopefully only temporarily.
Confirmed: SpaceX plans two launches for tomorrow
Capitalism in space: SpaceX has now confirmed that it will attempt two Falcon 9 launches tomorrow at its launch facility at Cape Canaveral, the first to launch 60 Starlink satellites at 10:12 am (Eastern) and the second to launch an Argentinian radar satellite at 7:18 pm (Eastern).
In the first launch the first stage, used once before, will attempt to land on the drone ship in the Atlantic. On the second launch the first stage, used three times previously, will return to Cape Canaveral for its landing attempt.
The live stream for both will be available here.
SpaceX will also tomorrow attempt a 500 meter hop of its sixth Starship prototype. The live stream of that can be seen here.
Meanwhile Rocket Lab has shifted its launch this weekend in New Zealand from tonight to tomorrow night at 11:05 pm (Eastern). The live stream will be aired here.
That means on August 30, 2020 there could be three American launches as well as another test flight of a new reusable rocket.
Note: Astra has delayed the first orbital test flight of its rocket to no early than September 10th due to poor weather in Kodiak, Alaska.
ULA’s Delta 4 Heavy: Launch abort at T-3 seconds tonight
UPDATE: It appears ULA will need at least a week to analyze the situation before attempting another launch. It also appears that SpaceX is going forward with its two launches on August 30.
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Tonight’s attempt by ULA to launch a National Reconnaissance Satellite on its Delta 4 Heavy rocket was aborted at T-3 seconds when the rocket’s main engines did an automatic abort. The image to the right shows the rocket immediately after the engines shut down, the smoke clearing and the rocket still sitting on the launch pad.
They are presently unfueling the rocket and will not launch tonight. They have not set a new launch date, and there is also no word on whether this launch delay will force delays in the two SpaceX launches set for August 30th. My guess is that the issue tonight will take time to assess, so they will give up their place in line and let SpaceX proceed as planned.
In watching ULA’s broadcast tonight, as well as reviewing the issues that prevented launch two days ago, I was struck by several things. First, ULA’s promo films to tout the wonders of the Delta family of rockets actually made them seem incredibly clunky and complex. There seemed to be too many pieces and complex operations to get the rocket ready for launch, which makes sense as Delta rockets are very costly and not competitive with today’s market. This is the exact reason ULA is in the process of retiring the entire Delta family. They will complete the already purchased and scheduled launches, but in the future will use their new Vulcan rocket for similar future bids.
Second, the number of minor and major technical issues during both countdowns reinforced my impressions above. This is a very complex rocket to launch, and that complexity apparently leads to many issues that make launch difficult.
For the scrub on August 26 they first had two blown fuses in a launchpad heater that had to be replaced, then a pneumatics system issue that was apparently not solved during the countdown. When they scrubbed, however, they said they did it because of “several problems,” not just this one.
On tonight’s launch they first had an issue with a fuel valve, then several fuel sensor alarms gave them problems, requiring them to disable them to proceed, then the temperatures in the payload electronics posed an issue that after some analysis was considered acceptable. These issues caused the launch to be delayed by about an hour and a half.
Finally, the rocket’s main engines shut down at the rescheduled lift-off time.
It might not be fair, but in comparing this ULA launch effort with the numerous countdowns by SpaceX the differences were stark. SpaceX has had comparable few issues during recent launches, with only one launch recently scrubbed due to a technical issue in July. Moreover, the company’s launch team has several times had similar launch aborts at T-0, and still were able to recycle everything and proceed to launch immediately.
All these impressions once again suggest that ULA is making the right decision to retire Delta. That it is going to take them several more years however to launch several more government surveillance satellites raises questions about the decisions of our government to pay for such a unwieldy and expensive rocket. There now are better and cheaper options available.
Foster Brooks Roasts Don Rickles
An evening pause: For my younger readers, Foster Brooks’s comedy was based on his amazing ability to play a funny drunk. And he did it when Americans still could laugh at this stuff and knew there was no reason to get outraged.
Hat tip Tom Biggar.