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Starlink lost 40 satellites to a geomagnetic storm

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Re: Starlink lost 40 satellites to a geomagnetic storm

#41
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

SpaceX should build a satellite picker satellite to collect their dysfunctional Starlink satellites and bring them back on Earth. They could study their vulnerabilities and apply the lessons learned to shield future Starlink satellites against solar storms.

Re: Starlink lost 40 satellites to a geomagnetic storm

#42

I have to wonder if anybody else lost satellites. Starlink is at an especially low orbit, so either they were really unlucky, or they have poor radiation shielding. [EDIT] OK I made the wrong assumption that this was due to radiation, but it was due to the atmosphere being 50% more dense than usual due to the storm, which led to failure of the satellites. This makes good sense. Next time I'll read TFA before I commen…

The Starlink satellites are launched into a very low orbit, and raise to their final orbit. These satellites had just launched, and had not yet raised their orbit, so they were lower than the rest of the constellation. > SpaceX deploys its satellites into these lower obits so that in the very rare case any satellite does not pass initial system checkouts it will quickly be deorbited by atmospheric drag. ... > Unfortu…

This method of parking in a lower orbit is also why the trains of satellites are highly visible for a few weeks after launch. They extend their solar panels horizontally to minimize drag, which causes them to reflect the sun just after dusk and just before dawn. Once they reach their higher orbit they reorient their panels perpendicular to the earth, greatly lowering their apparent brightness.

Re: Starlink lost 40 satellites to a geomagnetic storm

#43
post #3

Both apparently good for the future of space debris, and a publicity opportunity... Despite losing probably millions of dollars... Good job SpaceX.

The press release specifically states the satellites will de-orbit and burn up by design.

yes, they turned a loss into publicity... while not harming future space operations... They turned a loss into a win-win, I think.

Re: Starlink lost 40 satellites to a geomagnetic storm

#44
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

SpaceX should build a satellite picker satellite to collect their dysfunctional Starlink satellites and bring them back on Earth. They could study their vulnerabilities and apply the lessons learned to shield future Starlink satellites against solar storms.

They are building that - it’s called Starship and one of the configurations will be a cargo ship with a bay and an arm that can pick stuff up and bring them back.

Re: Starlink lost 40 satellites to a geomagnetic storm

#45
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

An entire launch worth of satellites is not a "rounding error."

The carbon impact of just one launch is pretty obscene.

Re: Starlink lost 40 satellites to a geomagnetic storm

#46

> SpaceX deploys its satellites into these lower obits Unintentional pun on "orbits", perhaps? It's incredible to me that launching satellites is so easy now that a failure of 40 satellites can be tolerated. On the bright side, I guess this gave SpaceX a chance to talk about their debris-limiting strategy!

I wonder who'll write their orbituary.

New York Times

Capital City, Earth – Satellite Starlink XB-4590 has shut down yesterday, February 8, 2132, following a geomagnetic storm that irreparably crippled its circuits. XB-4590 was 5 months old. It is survived by the 32,008 other active Starlink satellites orbiting the Earth. SpaceX CEO Elon Musk IV declined to comment for this article.

Re: Starlink lost 40 satellites to a geomagnetic storm

#47
post #3

Both apparently good for the future of space debris, and a publicity opportunity... Despite losing probably millions of dollars... Good job SpaceX.

The press release specifically states the satellites will de-orbit and burn up by design.

The press release states the same safety plan SpaceX has been stating. We'll get to see if it works (which I expect it to), but shouldn't assume it already has.

Re: Starlink lost 40 satellites to a geomagnetic storm

#48
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

An entire launch worth of satellites is not a "rounding error." The carbon impact of just one launch is pretty obscene.

In context of 1700 starlink satellites already in orbit and 30+ launches that put them there, it’s a rounding error.

Same goes for carbon impact, etc.

Re: Starlink lost 40 satellites to a geomagnetic storm

#49
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

SpaceX should build a satellite picker satellite to collect their dysfunctional Starlink satellites and bring them back on Earth. They could study their vulnerabilities and apply the lessons learned to shield future Starlink satellites against solar storms.

It is not that the satellites were insufficiently shielded against solar storms, it's that the atmosphere was impacted and thus their tactic of low Earth orbit didn't work at this precise moment.

Re: Starlink lost 40 satellites to a geomagnetic storm

#50
post #20

40 sats makes up about 2% of the current fleet - so a rounding error in cost and time. The important part of this news is how those 40 sats deorbit and leave no junk either in orbit or on earth.

SpaceX should build a satellite picker satellite to collect their dysfunctional Starlink satellites and bring them back on Earth. They could study their vulnerabilities and apply the lessons learned to shield future Starlink satellites against solar storms.

The press release implies that the issue is known. They entered a safe mode just after launch, and had not yet reached an orbit from which they were able to successfully leave safe mode.
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