ISS attitude control

From: satrack_at_libero.it via Seesat-l <satrack_at_libero.it>
Date: Mon, 30 Jun 2014 16:41:12 +0200 (CEST)
Dear List,

 

I am working on a program that superimposes country borders
and city names to the live video provided by the HD cameras onboard the ISS.
The program already works rather well and, a part from a residual distortion at
the corners, the match appears good. 

 

The problem is that I have to correct the camera angle to
match images taken in different part of the globe, so I am wondering if I am
doing something wrong with the station attitude. Maybe someone of the list can
help me.

 

I assume that the attitude control of the station uses the
LVLH frame, so I rotate the Z axis of the station toward the Earth’s centre;
the Y axis perpendicular to the orbit plane, and the X axis to complete the
frame. 


 

So far, I experienced errors of 5 – 8 degrees, as if the
station was ‘yaw steering’.  


 

The web page where it is possible to watch the HD video with
the real time overlay:

 

http://www.satflare.com/isshd/

 

You can find some screen-shots at the end of the page or
here:

 

http://www.satflare.com/isshd/ExampleBucharest.jpg

http://www.satflare.com/isshd/ExampleHaiti.jpg

http://www.satflare.com/isshd/OverlayExample.jpg

http://www.satflare.com/isshd/ExampleBudapest.jpg

 



Regards,

Simone





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Received on Mon Jun 30 2014 - 09:42:06 UTC

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