def ITRF2GEO(posITRF):
'''Converts from earth rectangular coordinate to Geodetic coordinate.
Input will be the rectangular three coordinates [x,y,z]. Kernel
file PCK is required.
'''
load_kernels()
_, value = spice.bodvcd(399, "RADII", 3)
# Reuturns Earh radii [larger equatorial radius, smaller
# equatorial radius, polar radius] dim is the dimension of
# returned values Value is the returned values
rEquatr = value[0]
rPolar = value[2]
# Calculate the flattening factor for earth
f = (rEquatr - rPolar) / rEquatr
# Calculate the geodetic coordinate on earth. lon,lat are in
# radius. alt is the same unit with in put posITRF
lon, lat, alt = spice.recgeo(posITRF, rEquatr, f)
# Return longitude and latitude in degree
lonDeg = spice.convrt(lon, "RADIANS", "DEGREES")
latDeg = spice.convrt(lat, "RADIANS", "DEGREES")
return lon, lonDeg, lat, latDeg, alt
def ITRF2GEO(posITRF):
'''Converts from earth rectangular coordinate to Geodetic coordinate.
Input will be the rectangular three coordinates [x,y,z]. Kernel
file PCK is required.
'''
load_kernels()
_, value = spice.bodvcd(399, "RADII", 3)
# Reuturns Earh radii [larger equatorial radius, smaller
# equatorial radius, polar radius] dim is the dimension of
# returned values Value is the returned values
rEquatr = value[0]
rPolar = value[2]
# Calculate the flattening factor for earth
f = (rEquatr - rPolar) / rEquatr
# Calculate the geodetic coordinate on earth. lon,lat are in
# radius. alt is the same unit with in put posITRF
lon, lat, alt = spice.recgeo(posITRF, rEquatr, f)
# Return longitude and latitude in degree
lonDeg = spice.convrt(lon, "RADIANS", "DEGREES")
latDeg = spice.convrt(lat, "RADIANS", "DEGREES")
return lon, lonDeg, lat, latDeg, alt
def test_bodvXds(self): self.assertEqual( spice.bodvcd( 399, 'VARS', 10), self.var399 ) self.assertEqual( spice.bodvcd( 99, 'VARS', 10), self.var99 ) self.assertEqual( spice.bodvrd( 'earth', 'VARS', 10), self.var399 ) self.assertEqual( spice.bodvrd( 'mybod', 'VARS', 10), self.var99 )
