@kevinawilson Could you comment on this? I don't remember much from the meta implementation, but I don't fully understand this particular line of the commit.

Why was if vlsr changed to if vlsr or meta? Isn't that the cause of the error (considering the user did not provide a location)? @davewyers that's just an assumption, please confirm or deny whether the location was indeed not part of the observing parameters (obs_parameters=obs).

from virgo.

Hi @0xCoto

The Lat and Long are defined in the file then called in the obs object.

Define observation parameters

obs = {
    'dev_args': '',
    'rf_gain': 10,
    'if_gain': 0,
    'bb_gain': 0,
    'frequency': freq,
    'bandwidth': 2.4e6,
    'channels': 2048,
    't_sample': 1,
    'duration': 240,
    'loc': str(lat) + ' ' + str(lon) + ' ' + str(height),
    'ra_dec': str(RA) + ' '+ str(DEC),
    'az_alt': str(az) + ' ' + str(alt)
 }

gal_l, gal_b = virgo.galactic(RA,DEC)
print ('Galactic l = '+str(gal_l))
print ('Galactic b = '+str(gal_b))
virgo.simulate(gal_l, gal_b, beamwidth, -400, 400, prefix+'_simulate.png')

print ('Observe run start')
virgo.observe(obs_parameters=obs, obs_file=prefix+'_observation.dat')
print ('Observe run end')

from virgo.

I know this has been out there awhile but appears still an issue with recent, I've had success to change to recommended from EarthLocation changing to for geocentric; lon, lat, height for geodetic). Also note longitude is EAST only so 0 to 360

line 720 change order
original obs_location = EarthLocation.from_geodetic(loc[0], loc[1], loc[2])
change obs_location = EarthLocation.from_geodetic(loc[1], loc[0], loc[2])

line 624 added this global to remove error spam
added global mjd

line 145, 228 change order
original loc = EarthLocation(lat=latu.deg, lon=lonu.deg, height=heightu.m)
changed loc = EarthLocation(lon=lonu.deg, lat=latu.deg, height=heightu.m)

example obs

Define observation parameters

obs = {
'rf_gain': 15,
'if_gain': 5,
'bb_gain': 5,
'dev_args': '',
'frequency': 1420e6,
'bandwidth': 2.4e6,
'channels': 2048,
't_sample': 1,
'duration': 120,
'loc': [32.62, 233.39, 300.00],
'ra_dec': '',
'az_alt': [180, 60],
'spectrometer': 'FTF',
'obs_file': 'firstob.dat6'
}

from virgo.