私は伝播した衛星軌道の緯度、経度、高度を得るためにAstroPyEarthLocation
を使用しました。今、私はnp.savetxt()
を使ってデータをtxtファイルに入れようとしています。EarthLocationからのAstroPyデータを数値で取得する方法(Lat、Lon、Alt)
私のデータは、[< Latitude XX.xxx deg>、< Latitude YY.yyy deg>、...]の代わりに厳密に数値でなければなりません。誰もこれを行う方法を知っていますか?
コード:
now = [] #UTC time at each propagation step
xyz =[] #Xyz coordinates from OrbitalPy initial orbit propagation
cartrep = [] #Cartesian Representation
gcrs = [] #Geocentric Celestial Reference System/Geocentric Equatorial Inertial, the default coord system of OrbitalPy
itrs =[] #International Terrestrial Reference System coordinates
lat = [] #Longitude of the location, for the default ellipsoid
lon = [] #Longitude of the location, for the default ellipsoid
alt = [] #Height of the location, for the default ellipsoid
for i in range(propNum):
xyz = (myOrbitX[i], myOrbitY[i], myOrbitZ[i]) #Xyz coord for each prop. step
now = time.Time(myT[i]) #UTC time at each propagation step
cartrep = coord.CartesianRepresentation(*xyz, unit=u.m) #Add units of [m] to xyz
gcrs = coord.GCRS(cartrep, obstime=time.Time(myT[i])) #Let AstroPy know xyz is in GCRS
itrs = gcrs.transform_to(coord.ITRS(obstime=time.Time(myT[i]))) #Convert GCRS to ITRS
loc = coord.EarthLocation(*itrs.cartesian.xyz) #Get lat/lon/height from ITRS
lat.append(loc.lat) #Create latitude list
lon.append(loc.lon) #Create longitude list
alt.append(loc.height) #Create altitude list
print('Lat:')
print(lat)
print('Lon:')
print(lon)
print('Alt:')
print(alt)
print('Time:')
print(myT)
出力:
Lat:
[<Latitude 27.689176073130298 deg>, <Latitude 48.45032120487385 deg>, <Latitude 48.364205712585104 deg>, <Latitude 27.538849564221568 deg>, <Latitude -0.03713701451174661 deg>, <Latitude -27.6161238116795 deg>, <Latitude -48.41635545462272 deg>, <Latitude -48.38265336989975 deg>, <Latitude -27.529850683687265 deg>, <Latitude 0.0929886673818169 deg>]
Lon:
[<Longitude -11.245369984319288 deg>, <Longitude 24.602646508968856 deg>, <Longitude 77.51869866724904 deg>, <Longitude 113.20045826221023 deg>, <Longitude 135.11667887191157 deg>, <Longitude 157.05927178662643 deg>, <Longitude -167.1439210586291 deg>, <Longitude -114.16647366586022 deg>, <Longitude -78.40457926191569 deg>, <Longitude -56.45443351644551 deg>]
Alt:
[<Quantity 409193.55555070826 m>, <Quantity 418422.38904031017 m>, <Quantity 419775.9010528204 m>, <Quantity 412775.65686140396 m>, <Quantity 407430.35452421894 m>, <Quantity 410337.3219834759 m>, <Quantity 415810.49056818814 m>, <Quantity 414410.9036345114 m>, <Quantity 406680.40398573445 m>, <Quantity 402944.3590314008 m>]
Time:
['2000-01-01 12:09:16.000', '2000-01-01 12:18:32.000', '2000-01-01 12:27:48.000', '2000-01-01 12:37:04.000', '2000-01-01 12:46:20.000', '2000-01-01 12:55:36.000', '2000-01-01 13:04:52.000', '2000-01-01 13:14:08.000', '2000-01-01 13:23:24.000', '2000-01-01 13:32:40.000']
また、特定のユニットに値が必要な場合は、 'lon.to_value( 'radian')'などのようにすることができます。 –