|
SUPPORT SITE |
|
|
|
SUPPORT SITE |
|
Path: SpacecraftEstimation/StellarAttDet
% Reduction of stellar coordinates to apparent coordinates.
Includes corrections for
- radial velocity of star
- parallax
- gravitational light deflection
- relativistic aberration due to earth and spacecraft velocity
- Earth precession and nutation
------------------------------------------------------------------------
Form:
u = SReduce( rA0, dec0, pMRA, pMDec, parallax, rV, vSc, jD )
------------------------------------------------------------------------
------
Inputs
------
rA0 (1,1) Catalog right ascension
dec0 (1,1) Catalog declination
pMRA (1,1) Proper motion in right ascension
pMDec (1,1) Proper motion in declination
parallax (1,1) Stellar parallax
rV (1,1) Radial velocity (km/sec)
vSc (1,1) Spacecraft velocity vector (km/sec)
jD (1,1) Julian date
-------
Outputs
-------
u (3,1) Unit vector
------------------------------------------------------------------------
References: Astronomical Almanac for 1993, U.S. Government
Printing Office, B39-B41
------------------------------------------------------------------------
Common: Time/JD2T Common: Transform/RaDec2U Math: Linear/Unit SC: Ephem/EarthNut SC: Ephem/EarthPre SpacecraftEstimation: StellarEphem/EarthBc SpacecraftEstimation: StellarEphem/LightDef SpacecraftEstimation: StellarEphem/StellAbr SpacecraftEstimation: StellarEphem/SunBc
Back to the SpacecraftEstimation Module page