Convert Earth Centered Earth Fixed (ECEF) coordinates to GSM coordinates

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Megha
Megha 2018-12-9
评论： Koundinya 2018-12-12
It is an urgent need to convert ECEF to GSM coordinates.
I tried converting ECEF to lat,lon,alt in geodetic cordinates using,
lla_gd = ecef2lla(X,Y,Z, 'WGS84'); % X,Y,Z are in ECEF cordinates
% the o/p lla_gd is in geodetic lat, lon, alt
Now i do not have any idea how to convert this geodetic lat, lon, alt to GSM cordinates.
Moreover, I tried converting geodetic lat,lon, alt to geocentric lat, lon, alt.
For this,
gc_lat = geod2geoc(lat, alt, 'WGS84');
the input lat and alt are in geodetic cordinates obtained by lla_gd
this gives only the o/p of geocentric latitude. There is no geocentric altitude o/p!
Please give answer. how to Convert Earth Centered Earth Fixed (ECEF) coordinates to GSM coordinates.
Help is highly appricaiated.
  1 个评论
Koundinya
Koundinya 2018-12-12
Altitude is measured from a point on the earth's surface, i.e , it is a topocentric measurement. So how and why would geocentric altitude even be defined ?

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