General > General Technical Chat
we need traffic lights for satellites
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madires:
SpaceX Starlink satellites responsible for over half of close encounters in orbit, scientist says: https://www.space.com/spacex-starlink-satellite-collision-alerts-on-the-rise (includes autoplay video :()
SiliconWizard:
And this is just the beginning... :-DD
SiliconWizard:

--- Quote from: GlennSprigg on April 16, 2021, 11:47:40 am ---Maybe my 'mind' is too simplistic and/or naive, but I can't help thinking that all we need is better communication between Countries, and
work more together towards common goals/needs in space now.
--- End quote ---

This sounds nice, but what exactly would be those common goals and who is going to define them? Who is going to make sure they'll be good for people and the future of humankind? At this point, it looks like a lot of what we have done has been pretty disastrous on a large scale, and those disastrous decisions are usually the ones that are the most well shared among countries. In other words, if there's something we seem to easily agree on worldwide, it's doing a lot of shit. This doesn't bode well. ::)


--- Quote from: GlennSprigg on April 16, 2021, 11:47:40 am ---I would 'like' to think that GONE are the Cold-War days of secretive developments
and deployments, and to a certain degree it is happening now between certain Countries & Companies!    :-+

--- End quote ---

Oh really. It doesn't appear to be the case. The current situation is a lot worse than during the cold war IMHO, and the world a lot more unstable.
james_s:

--- Quote from: timgiles on September 04, 2019, 09:53:08 am ---I still find it hard to believe in a three dimensional space (spherical skin with depth of x meters or kms) the size of the earths diameter plus a tiny bit - that satellites really get that close to each other - ever! Unless they are programmed to do so (conspiracy theory time!).

Am I wrong? Please help my old grey matter understand if so. I just dont see it happening. Sure, space debris, but that is many many magnitudes higher density.

--- End quote ---

It's one of those things where if you tried to aim a satellite so it would collide with another it would probably never happen, but chance collisions do happen. It's similar with aircraft, the sky is really big, airplanes are relatively thin, yet aircraft still collide now and then.
ejeffrey:
Also just like aircraft certain orbits are much more popular than others, such a sun synchronous polar orbits and geostationary equitorial orbits.

Also the threshold for corrective action is extremely conservative.  The vast majority of events would not result in a collision without correction but they move anyway.
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