How to use the jplephem.doppler_fraction function in jplephem
To help you get started, we’ve selected a few jplephem examples, based on popular ways it is used in public projects.
Secure your code as it's written. Use Snyk Code to scan source code in minutes - no build needed - and fix issues immediately.
rabrahm / ceres / arces / arcespipe.py View on Github 
epoch = h[0].header['EQUINOX']
ra2,dec2 = GLOBALutils.getcoords(obname,mjd,filen=reffile)
if ra2 !=0 and dec2 != 0:
ra = ra2
dec = dec2
else:
print '\t\tUsing the coordinates found in the image header.'
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print '\t\tBarycentric velocity:', bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name='APO3.5'
gobs.lat=rad(latitude) # lat/long in decimal degrees
gobs.long=rad(longitude)
DDATE = h[0].header['DATE-OBS'].split('T')[0]
HHOUR = h[0].header['DATE-OBS'].split('T')[1]
Mho = HHOUR[:2]
Mmi = HHOUR[3:5]longitude = -17.885
epoch = 2000.
ra2,dec2 = GLOBALutils.getcoords(obname,mjd,filen=reffile)
if ra2 !=0 and dec2 != 0:
ra = ra2
dec = dec2
else:
print '\t\tUsing the coordinates found in the image header.'
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( float(obpos[0]), float(obpos[1]), float(obpos[2]) )
res = jplephem.doppler_fraction(float(ra/15.0), float(dec), long(mjd), float(mjd%1), 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
gobs = ephem.Observer()
gobs.name = 'La Palma'
gobs.lat = rad(latitude) # lat/long in decimal degrees
gobs.long = rad(longitude)
gobs.date = h[0].header['DATE-OBS'][:10] + ' ' + h[0].header['DATE-OBS'][11:]
mephem = ephem.Moon()
mephem.compute(gobs)
Mcoo = jplephem.object_track("Moon", int(mjd), float(mjd%1), 1, 0.0)
Mp = jplephem.barycentric_object_track("Moon", int(mjd), float(mjd%1), 1, 0.0)ra2,dec2 = GLOBALutils.getcoords(obname,mjd,filen=reffile)
if ra2 !=0 and dec2 != 0:
ra = ra2
dec = dec2
else:
print '\t\tUsing the coordinates found in the image header.'
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name='Clay_Mag_2'
gobs.lat=rad(latitude) # lat/long in decimal degrees
gobs.long=rad(longitude)
DDATE = h[ih].header['UT-DATE']
HHOUR = mikeutils.get_hour(float(h[ih].header['UT-TIME']))
Mho = HHOUR[:2]ra2,dec2 = GLOBALutils.getcoords(obname,mjd,filen=reffile)
if ra2 !=0 and dec2 != 0:
ra = ra2
dec = dec2
else:
print '\t\tUsing the coordinates found in the image header.'
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name='Clay_Mag_2'
gobs.lat=rad(latitude) # lat/long in decimal degrees
gobs.long=rad(longitude)
DDATE = h[0].header['UT-DATE']
HHOUR = h[0].header['UT-TIME']
Mho = HHOUR[:2]if ra2 !=0 and dec2 != 0:
ra = ra2
dec = dec2
known_coords = True
elif known_coords:
print '\t\tUsing the coordinates from symbad query.'
else:
print '\t\tUnknown coordinate for this object.'
if known_coords:
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
else:
bcvel_baryc = 0.
mbjd = mjd
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name = 'ODUC'
gobs.lat = rad(latitude) # lat/long in decimal degrees
gobs.long = rad(longitude)scmjd,scmjd0 = vbtutils.mjd_fromheader(hd)
ra2,dec2 = GLOBALutils.getcoords(obname,scmjd,filen=reffile)
if ra2 !=0 and dec2 != 0:
RA = ra2
DEC = dec2
else:
print '\t\tUsing the coordinates found in the image header.'
# set info for compute the baricentric correction
iers = GLOBALutils.JPLiers( baryc_dir, scmjd-999.0, scmjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(RA/15.0, DEC, int(scmjd), scmjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5 #This in the barycentric velocity
res = jplephem.pulse_delay(RA/15.0, DEC, int(scmjd), scmjd%1, 1, 0.0)
scmbjd = scmjd + res['delay'][0] / (3600.0 * 24.0) #This is the modified barycentric julian day of the observation
# set observatory info to retrive info about the moon
gobs = ephem.Observer()
gobs.name = 'VBT'
gobs.lat = rad(latitude)
gobs.long = rad(longitude)
#gobs.date = hd['UT-DATE'] + ' ' + hd['UT-TIME'].replace(':','_')
gobs.date = hd['DATE-OBS'].replace('T',' ')
mephem = ephem.Moon()
mephem.compute(gobs)
Mcoo = jplephem.object_track("Moon", int(scmjd), float(scmjd%1), 1, 0.0)print '\t\tUsing the coordinates found in the image header.'
# set observatory parameters
altitude = float(h[0].header['ESO TEL GEOELEV'])
latitude = float(h[0].header['ESO TEL GEOLAT'])
longitude = float(h[0].header['ESO TEL GEOLON'])
epoch = 2000.
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( float(obpos[0]), float(obpos[1]), float(obpos[2]) )
res = jplephem.doppler_fraction(float(ra/15.0), float(dec), long(mjd), float(mjd%1), 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name = 'VLT'
gobs.lat = rad(latitude) # lat/long in decimal degrees
gobs.long = rad(longitude)
gobs.date = h[0].header['DATE-OBS'].replace('T',' ')
mephem = ephem.Moon()
mephem.compute(gobs)altitude = 2335.
latitude = -29.2543
longitude = -70.7346
epoch = 2000.000
#bcvel_baryc, bjd = pyasl.helcorr(longitude, latitude, altitude, ra, dec, mjd+2400000.5, debug=True)
#print corr, hjd
#print gfd
iers = GLOBALutils.JPLiers( baryc_dir, mjd-999.0, mjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( float(obpos[0]), float(obpos[1]), float(obpos[2]) )
res = jplephem.doppler_fraction(float(ra/15.0), float(dec), long(mjd), float(mjd%1), 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
#lbary_ltopo = bcvel_baryc / 2.99792458E5 + 1.
print "\t\tBarycentric velocity:", bcvel_baryc
res = jplephem.pulse_delay(ra/15.0, dec, int(mjd), mjd%1, 1, 0.0)
mbjd = mjd + res['delay'][0] / (3600.0 * 24.0)
# Moon Phase Calculations
gobs = ephem.Observer()
gobs.name = 'Eso2.2'
gobs.lat = rad(latitude) # lat/long in decimal degrees
gobs.long = rad(longitude)
gobs.date = h[0].header['DATE-OBS'][:10] + ' ' + h[0].header['DATE-OBS'][11:]RON = hd['ENOISE']
GAIN = hd['EGAIN']
scmjd,scmjd0 = dupontutils.mjd_fromheader(hd)
altitude = hd['SITEALT']
latitude = hd['SITELAT']
longitude = hd['SITELONG']
epoch = hd['EPOCH']
iers = GLOBALutils.JPLiers( baryc_dir, scmjd-999.0, scmjd+999.0 )
obsradius, R0 = GLOBALutils.JPLR0( latitude, altitude)
obpos = GLOBALutils.obspos( longitude, obsradius, R0 )
jplephem.set_ephemeris_dir( baryc_dir , ephemeris )
jplephem.set_observer_coordinates( obpos[0], obpos[1], obpos[2] )
res = jplephem.doppler_fraction(RA/15.0, DEC, int(scmjd), scmjd%1, 1, 0.0)
lbary_ltopo = 1.0 + res['frac'][0]
bcvel_baryc = ( lbary_ltopo - 1.0 ) * 2.99792458E5
res = jplephem.pulse_delay(RA/15.0, DEC, int(scmjd), scmjd%1, 1, 0.0)
mbjd = scmjd + res['delay'][0] / (3600.0 * 24.0)
gobs = ephem.Observer()
gobs.name = 'DUPONT'
gobs.lat = rad(latitude) # lat/long in decimal degrees
gobs.long = rad(longitude)
gobs.date = hd['UT-DATE'].replace('-','/') + ' ' + hd['UT-TIME']
mephem = ephem.Moon()
mephem.compute(gobs)
Mcoo = jplephem.object_track("Moon", int(scmjd), float(scmjd%1), 1, 0.0)
Mp = jplephem.barycentric_object_track("Moon", int(scmjd), float(scmjd%1), 1, 0.0)jplephem
Use a JPL ephemeris to predict planet positions.
Package Health Score
65 / 100Popular jplephem functions
- jplephem.barycentric_object_track
- jplephem.daf.DAF
- jplephem.doppler_fraction
- jplephem.Ephemeris
- jplephem.exceptions.OutOfRangeError
- jplephem.names.target_name_pairs
- jplephem.names.target_names
- jplephem.names.target_names.get
- jplephem.object_doppler
- jplephem.object_track
- jplephem.pck.PCK
- jplephem.pulse_delay
- jplephem.set_ephemeris_dir
- jplephem.set_observer_coordinates
- jplephem.spk.S_PER_DAY
- jplephem.spk.SPK