PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM INSTRUMENT_HOST_NAME = "ROSETTA-ORBITER" DATA_SET_ID = "RO-SS-RPCICA-3-CR2-CALIB-V1.0" PRODUCT_CREATION_TIME = 2020-10-30T07:59:21 PRODUCT_ID = "CALIBRATION.TXT" OBJECT = TEXT PUBLICATION_DATE = 2020-10-30 INTERCHANGE_FORMAT = ASCII NOTE = "Description of calibration files" END_OBJECT = TEXT END ***** File CALIBRATION.TXT Calibration files for RPC-ICA data The level 3 data is identical to the level 2 edited raw data except that calibration constants have been used to turn the data into physics units, that of differential flux [particles / cm^2 / s / sr / eV]. The procedure to turn level 2 data into level 3 data is described in general terms in the EAICD, section 2.4.1. In short, data is divided into light or heavy ions using the mass masks provided in the directory CALIB/MASS_MASK. Then the geometric factor found in CALIB/GFACTOR is applied according to the formula given in the EAICD. Physical elevation angles corresponding to different elevation index levels are found in the tables in CALIB/ELEVATION and the energy tables providing energy for each energy index level are found in CALIB/ENERGY. Different tables for MASS_MASK and GFACTOR exist for different post-acceleration settings and different software versions and for two ion mass ranges, light (approximately 1 to 4 amu) and heavier ions. For elevation and energy there is one table for each software version.