Monthly Normalized MAVEN Data (2014-2021)

These data were obtained from the magnetometer (MAG), Neutral Gas and Ion Mass Spectrometer (NGIMS), and Solar Wind Ion Analyzer (SWIA) onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.  These two data sets were derived from these three instruments' data products and utilized in the article Influence of Magnetic Fields on Precipitating Solar Wind Hydrogen at Mars, which we plan to submit to Geophysical Research Letters.

The backscattered and downward propagating penetrating proton data have been separated into two data files titled respectively.  The contents of each file are as follows:

1.  Time [s]:  epoch time (seconds since Jan. 1, 1970) for each penetrating proton measurement

2.  Orbit [#]:  MAVEN's orbit number

3.  LSM [degrees]:  Martian solar longitude

4.  Flux  [eV/(eV s sr cm^2)]:  peak angle averaged differential energy flux for each 4-s spectrum in electronvolt per electronvolt x second x steradian x square centimeters.

5.  Normalized Flux:  monthly normalized peak flux (unitless)

6.  Energy [eV]:  energy at which peak flux occurred for each 4-s spectrum found from Gaussian fit in electronvolts

7.  FWHM [eV]:  full width at half maximum of 4-s spectrum found from Gaussian fit in electronvolts

8.  Altitude [km]:  spacecraft altitude in kilometers 

9.  SZA [degrees]:  solar zenith angle in degrees 

10.  X_MSO [km]:  X position of MAVEN in the Mars-Sun-Orbit (MSO) coordinate system in kilometers

11.  Y_MSO [km]:  Y position of MAVEN in the MSO coordinate system in kilometers

12.  Z_MSO [km]:  Z position of MAVEN in the MSO coordinate system in kilometers

13.  Latitude [degrees]:  Martian planetary latitude

14.  Longitude [degrees]:  Martian planetary longitude

15.  Bx [nT]:  X component of magnetic field measured by MAG in MSO coordinates in nanotesla 

16.  By [nT]:  Y component of magnetic field measured by MAG in MSO coordinates in nanotesla

17.  Bz [nT]:  Z component of magnetic field measured by MAG in MSO coordinates in nanotesla

18.  Elevation Angle [degrees]:  local magnetic field elevation angle measured relative to a vector tangent to the Martian surface during each penetrating proton measurement.  90 degree elevation angle corresponds to radial configurations while 0 degree elevation angle corresponds to horizontal configurations.

19.  Column Density [cm^-2]:  CO2 column density derived from NGIMS measurements in inverse square centimeters.  All NaN values were used to fill for times during which NGIMS inbound verified data were not available, and the column density could not be determined.