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http://www.adass.org/adass/proceedings/adass94/aket.ps.
http://www.adass.org/adass/proceedings/adass94/aket.ps.
1. Calculating the Position and Velocity Components of HST
... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/aket.html -- 12.3 Кб -- 03.11.2000
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