I’m doing some work about SAR Sat.
I need to caculate the “relatvie speed of Satellite to the SAR Beam heart on earth surface”,
I have got the satellite eph(with velocity vector) and the latlon of Sar Beam heart.
the following is my idea:
1、transform the satellite ECI Postion and velocity of given time into topocentric frame by beam heart latlon.
2、get norm of velocity vector in topocentric.
is that correct?
the guy who will use this data told me that my result is not right.
i’m very confused,and can not found what’s the problem.
hope someone could give me some advice.