----- Original Message ----- From: "Armando Mercado" [email protected] To: [email protected] Sent: Monday, October 31, 2011 9:44 AM Subject: [amsat-bb] Re: Charge for Satellite Tracking?
Greetings,
Well, how would we feel if USSTRATCOM started charging for the use of their data that we use to track our satellites?
73, Armando N8IGJ
Hi Armando, N8IGJ
If our satellite has an onboard transponder it is possible to create the keplerian elements at a ground control station using the following method:
http://www.amsat.org/amsat/articles/g3ruh/123.html
And this is why a linear transponder is justified on board of our AMSAT satellites.
If the satellites is equipped with an apprpriate GPS system like on AO40 it's onboard computer can calculate it's position on the space and a ground control station can derive it's keplerian elements in real time and distribute it to the users via TLM messages.
ftp://rsd.gsfc.nasa.gov/pub/chesters/goesref/Moreau_GPS.pdf
73" de
i8CVS Domenico