[AR] Re: Star Trackers, was Re: Re: Spin stabilized rocket

  • From: Ivan Vuletich <ivan.vuletich@xxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Tue, 25 Dec 2018 21:50:50 +1100

A quick Google turned up OpenStarTracker http://openstartracker.org/, which looks real interesting.

According to the forum, it can run on a BeagleBone Black, but I haven't been able to find anything on minimum camera specs.


On 25/12/2018 17:51, Ray Rocket (Redacted sender ar0cketman for DMARC) wrote:

On Mon, 12/24/18, Henry Spencer <hspencer@xxxxxxxxxxxxx> wrote:
   Beyond maybe 75,000km, sun sensors and star trackers
  are about your only choice for external
attitude reference.  Fortunately,
lightweight miniature star trackers, e.g. the
Sinclair ST-16, are now very good:  point
one at any part of the sky not too close to the Sun, and
half a second later it reports full
three-axis attitude to sub-arcminute  precision.)
Wow, starting at only $120,000!

I always wondered at the lack of F/OSS star tracker code.  Should be able to 
easily run on something like a Raspberry Pi,

Interestingly enough, NASA licenses a Linux compiled star tracker code:
https://technology.nasa.gov/patent/TOP2-265
"Low Cost Star Tracker Software - Highly accurate attitude information for low cost 
COTS hardware"

Ah, just a question of proper search terms.  Google's suggestion of [star 
tracker matlab code] seems to be a sweet spot.


Ad Astra,

Ray



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