IkaTools | AstroRefs

Input Parameters

Latitude 50 deg

Longitude -75 deg

GMST 8 h

Results

ECEF Coordinates: --
ECI Coordinates: --
Celestial Coordinates: --
GMST Angle: --

Reference Model

WGS84 geodetic latitude and longitude are converted to zero-altitude ECEF coordinates, then rotated about the Z axis by GMST to produce ECI coordinates.

r_ECI = R3(GMST) r_ECEF

Right ascension is measured in the ECI equatorial plane from the inertial X axis; declination is the angle above that plane.

Earth-Centric Reference Geometry

Target: --

Loading reference scene...