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omni_convert.py
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omni_convert.py
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from astropy.table import Table
from astropy import units as u
import sys
# This script converts OMNIweb data from ASCII to FITS format
# USAGE: python omni_convert.py <filename> <mode>
# <filename> is the name of the file to be converted
# <mode> is the file type, either 1 (for 1-min data) or 5 (for 5-min data)
# References:
# 1. https://omniweb.gsfc.nasa.gov/form/dx1.html
# 2. https://spdf.gsfc.nasa.gov/pub/data/omni/
# 3. https://omniweb.gsfc.nasa.gov/html/HROdocum.html
# HRO header formats
hro1 = {
'col1' : ['Year',None],
'col2' : ['Day',None],
'col3' : ['Hour',None],
'col4' : ['Minute',None],
'col5' : ['IMF_ID',None],
'col6' : ['SW_ID',None],
'col7' : ['Number_IMF_AVG',None],
'col8' : ['Number_Plasma_AVG',None],
'col9' : ['Percent_interp',None],
'col10' : ['Timeshift',u.second],
'col11' : ['RMS_timeshift',u.second],
'col12' : ['RMS_Phasefront',u.degree],
'col13' : ['Time_btwn_obs',u.second],
'col14' : ['Field_mag_avg',u.nT],
'col15' : ['Bx_GSE/GSM',u.nT],
'col16' : ['By_GSE',u.nT],
'col17' : ['Bz_GSE',u.nT],
'col18' : ['By_GSM',u.nT],
'col19' : ['Bz_GSM',u.nT],
'col20' : ['RMS_SD_B_scalar',u.nT],
'col21' : ['RMS_SD_field_vector',u.nT],
'col22' : ['Flow_speed',u.km/u.s],
'col23' : ['Vx_GSE',u.km/u.s],
'col24' : ['Vy_GSE',u.km/u.s],
'col25' : ['Vz_GSE',u.km/u.s],
'col26' : ['Proton_density',u.cm**-3],
'col27' : ['Temp',u.K],
'col28' : ['Flow_pressure',u.nPa],
'col29' : ['Electric_field',u.mV/u.m],
'col30' : ['Plasma_beta',None],
'col31' : ['Alfven_mach_num',None],
'col32' : ['X_GSE',None],
'col33' : ['Y_GSE',None],
'col34' : ['Z_GSE',None],
'col35' : ['BSN_X_GSE',None],
'col36' : ['BSN_Y_GSE',None],
'col37' : ['BSN_Z_GSE',None],
'col38' : ['AE-index',u.nT],
'col39' : ['AL-index',u.nT],
'col40' : ['AU-index',u.nT],
'col41' : ['SYM/D-index',u.nT],
'col42' : ['SYM/H-index',u.nT],
'col43' : ['ASY/D-index',u.nT],
'col44' : ['ASY/H-index',u.nT],
'col45' : ['PC_N_index',None],
'col46' : ['Magnetosonic_mach_num',None],
}
hro5 = {
'col1' : ['Year',None],
'col2' : ['Day',None],
'col3' : ['Hour',None],
'col4' : ['Minute',None],
'col5' : ['IMF_ID',None],
'col6' : ['SW_ID',None],
'col7' : ['Number_IMF_AVG',None],
'col8' : ['Number_Plasma_AVG',None],
'col9' : ['Percent_interp',None],
'col10' : ['Timeshift',u.second],
'col11' : ['RMS_timeshift',u.second],
'col12' : ['RMS_Phasefront',u.degree],
'col13' : ['Time_btwn_obs',u.second],
'col14' : ['Field_mag_avg',u.nT],
'col15' : ['Bx_GSE/GSM',u.nT],
'col16' : ['By_GSE',u.nT],
'col17' : ['Bz_GSE',u.nT],
'col18' : ['By_GSM',u.nT],
'col19' : ['Bz_GSM',u.nT],
'col20' : ['RMS_SD_B_scalar',u.nT],
'col21' : ['RMS_SD_field_vector',u.nT],
'col22' : ['Flow_speed',u.km/u.s],
'col23' : ['Vx_GSE',u.km/u.s],
'col24' : ['Vy_GSE',u.km/u.s],
'col25' : ['Vz_GSE',u.km/u.s],
'col26' : ['Proton_density',u.cm**-3],
'col27' : ['Temp',u.K],
'col28' : ['Flow_pressure',u.nPa],
'col29' : ['Electric_field',u.mV/u.m],
'col30' : ['Plasma_beta',None],
'col31' : ['Alfven_mach_num',None],
'col32' : ['X_GSE',None],
'col33' : ['Y_GSE',None],
'col34' : ['Z_GSE',None],
'col35' : ['BSN_X_GSE',None],
'col36' : ['BSN_Y_GSE',None],
'col37' : ['BSN_Z_GSE',None],
'col38' : ['AE-index',u.nT],
'col39' : ['AL-index',u.nT],
'col40' : ['AU-index',u.nT],
'col41' : ['SYM/D-index',u.nT],
'col42' : ['SYM/H-index',u.nT],
'col43' : ['ASY/D-index',u.nT],
'col44' : ['ASY/H-index',u.nT],
'col45' : ['PC_N_index',None],
'col46' : ['Magnetosonic_mach_num',None],
'col47' : ['Proton_flux_>10_MeV',u.cm**-2*u.s**-1*u.sr**-1],
'col48' : ['Proton_flux_>30_MeV',u.cm**-2*u.s**-1*u.sr**-1],
'col49' : ['Proton_flux_>60_MeV',u.cm**-2*u.s**-1*u.sr**-1],
}
if __name__ == '__main__':
filename = sys.argv[1]
mode = sys.argv[2]
print('Reading file: ' + filename)
table = Table.read(filename,format='ascii')
if mode == '1':
for key,value in hro1.items():
table[key].unit = value[1]
table.rename_column(key,value[0])
if mode == '5':
for key,value in hro5.items():
table[key].unit = value[1]
table.rename_column(key,value[0])
table.write(filename.strip('.asc') + '.fits',overwrite=True)
print('Convert complete: ' + filename.strip('.asc') + '.fits')