Adds file_source: first 3 letters of the file name to distinguish file types (e.g. igu or Sta (both ultra-rapid however one from nasa source and the latter from glonassIac source)
Adds file_epoch: first epoch present in the file to know the timestamp of the ephemeris file.
With the combination we can find out if a gnssmeasurement was created using for example the file 'Stark_1D_22061518.sp3' or 'igu22144_00.sp3.Z'
Adds file_source: first 3 letters of the file name to distinguish file types (e.g. igu or Sta (both ultra-rapid however one from nasa source and the latter from glonassIac source) Adds file_epoch: first epoch present in the file to know the timestamp of the ephemeris file.
With the combination we can find out if a gnssmeasurement was created using for example the file 'Stark_1D_22061518.sp3' or 'igu22144_00.sp3.Z'