S5P_L2_CH4
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5P_L2_CH4 data.
| field name | type | dimensions | unit | description |
|---|---|---|---|---|
| index | int32 | {time} | zero-based index of the sample within the source product | |
| scanline_pixel_index | int16 | {time} | pixel index (0-based) within the scanline | |
| datetime | double | {time} | seconds since 2000-01-01 | start time of the measurement |
| longitude | float | {time} | degree_east | longitude of the ground pixel center (WGS84) |
| latitude | float | {time} | degree_north | latitude of the ground pixel center (WGS84) |
| longitude_bounds | float | {time, 4} | degree_east | longitudes of the ground pixel corners (WGS84) |
| latitude_bounds | float | {time, 4} | degree_north | latitudes of the ground pixel corners (WGS84) |
| instrument_longitude | float | {time} | degree_east | longitude of the sub-instrument point (WGS84) |
| instrument_latitude | float | {time} | degree_north | latitude of the sub-instrument point (WGS84) |
| instrument_altitude | float | {time} | m | altitude of the instrument (WGS84) |
| solar_zenith_angle | float | {time} | degree | zenith angle of the Sun at the ground pixel location (WGS84) |
| solar_azimuth_angle | float | {time} | degree | azimuth angle of the Sun at the ground pixel location (WGS84), measured East-of-North |
| viewing_zenith_angle | float | {time} | degree | zenith angle of the instrument at the ground pixel location (WGS84) |
| viewing_azimuth_angle | float | {time} | degree | azimuth angle of the instrument at the ground pixel location (WGS84), measured East-of-North |
| altitude_bounds_surface | float | {time, vertical, 2} | m | altitude bounds per profile layer; altitude is measured as the vertical distance to the surface |
| pressure_bounds | float | {time, vertical, 2} | hPa | pressure bounds per profile layer |
| CH4_column_mass_mixing_ratio | float | {time} | ng/g | column averaged dry air mixing ratio of methane |
| CH4_column_mass_mixing_ratio_stdev | float | {time} | ng/g | uncertainty of the column averaged dry air mixing ratio of methane (1 sigma error) |
| CH4_column_mass_mixing_ratio_avk | float | {time, vertical} | column averaging kernel for methane retrieval |