The SREM data files contain calibrated data for the different energy and particle species channels available in the SREM. Each data file contains 24 hours of data - from midnight to midnight UTC. (note that this is different from an Operational Day) - with the date covered by the file easily identifiable through the file name.
SREM calibrated data was produced from the SREM raw data acquired during the entire mission.
Data for the SREM on board other ESA missions can be retrieved from the Paul Scherrer Institute . In order to retrieve the data you will need to register first.
The files containing the SREM calibrated data will have a name of the form SREMPlanck_PACC_YYYYMMDD.fits where PACC stands for Processed ACCumulated data and YYYYMMDD is the date the data in the file was acquired.
The SREM processed data can be downloaded from the PLA interface: "Ancillary data" tab of the "Time-ordered information" section.
A list of the files available can be found here.
Each file contains three binary table extensions named CDFFITS1,CDFFITS2 and CDFFITS3. The first extension contains the accumulated counts data, the second extension the labels to identify the data in the first extension and the third extension the total radiation dosis. The contents of each extension are as follows.
|EPOCH||vector containing 1 string with UTC for center of accumulation interval in ISO format (YYYY-MM-DDTHH:MM:SS.MMMZ)||A24||NA|
|COUNTRATE||vector containing 15 elements (1 for each channel) with counts for accumulation period identified in the EPOCH column||E15.4||s-1|
|ORBIT||position (x,y,z) of the SREM in the ECI frame. Distance from center fo the Earth is R=√(x2+y2+z2)||E15.4||km|
|ATTITUDE||Not in use||E15.4||-|
|PROT FITQUAL||Not in use||I1||NA|
|ODPF||Not in use.||E15.4||-|
|ODPFERR||Not in use||E15.4||-|
|ELEC FITQUAL||Not in use||I1||-|
|ODEF||Not in use||E15.4||-|
|ODEFERR||Not in use||E15.4||-|
|ANISOTROPY||Not in use||E15.4||-|
|TEMPERATURE||2 element vector containing temperature of the two detector heads at each EPOCH||E15.4||°C|
|EPOCH||this is a keyword||NA||UTC|
|RADEPOCH||this is a keyword||A24||NA|
|RADFET||Value proportional to the absorbed dose on a diode mounted on the surface of SREM||E15.4||NA|
Note: SREM calibrated data files where initially provided in the Common Data Format (cdf) format. This has traditionally been the preferred data format for SREM on board previous ESA missions. However, as cdf is not widely used in the astrophysics community it was later agreed with the provider that fits files should also be provided. This meant taking the original cdf format and converting it to fits. The original cdf files can be retrieved from the SREM site at the PSI.
Space Radiation Environment Monitor
Universal Time Coordinate(d)
European Space Agency
Planck Legacy Archive