def check_args(ti):
print('check_args')
print(ti)
'''
Process all command line arguments.
[ if sys.argv[1:] is a valid set of command line arguments ->
return (ra_dec, lat_lon, dt) where ra_dec is a set of
celestial coordinates as a sdr.ra_dec instance,
lat_lon is position as a sdr.lat_lon instance, and
dt is a datetime.datetime instance
else ->
sys.stderr +:= error message
stop execution ]
'''
#-- 1 --
# [ if sys.argv[1:] has exactly four elements ->
# raw_ra_dec, raw_lat, raw_lon, raw_dt := those elements
# else ->
# sys.stderr +:= error message
# stop execution ]
arg_list = sys.argv[1:]
if len(arg_list) != 5:
usage ('Incorrect command line argument count.')
else:
raw_ra_dec, raw_lat, raw_lon, raw_dt, IONEX_TEC_file = arg_list
raw_dt = str(ti)
print('arg_list', arg_list)
#-- 2 --
# [ if raw_ra_dec is a valid set of equatorial coordinates ->
# ra_dec := those coordinates as a sdr.ra_dec instance
# else ->
# sys.stderr +:= error message
# stop execution ]
ra_dec = check_ra_dec(raw_ra_dec)
#-- 3 --
# [ if raw_lat is a valid latitude ->
# lat := that latitude in radians
# else ->
# sys.stderr +:= error message
# stop execution ]
try:
lat = sdr.parse_lat(raw_lat)
except SyntaxError, detail:
usage('Invalid latitude: {detail}'.format(detail=detail))
