Naming convention: Tyydddx.DAT
T tells the users that the naming convention is date/time based
yy is the year that the MRO was performed
ddd is the day of year (Jan 1 = 1) that the MRO was performed
x is a sequencing letter (A, B, C, ...) when multiple MRO's occur on the
same day (omitted when unnecessary).
.DAT binary data
.LBL PDS label for data file
Other Useful Files:
| AR-SEF | As run sequence of events file |
| Magnetometer Packets | More complete set of Io data returned during Phase 2 |
| GLL 280 | text file which describes the structure of the data |
| GLL 640 | text file which describes the structure of the data |
The EDR files contain data acquired by the Galileo Magnetometer during the Jupiter Approach (solar wind -> magnetosphere), Io, and Jupiter orbit 0 in the J0C mission phase. The data were returned to Earth by Memory Read Out (MRO, 80 byte).
The data acquisition strategy at Io was somewhat complex. Initially the optimal averager was started with 2 minute averages, then switched to 1 minute averages an hour or so before Io. There was another Opt/Avg on command set to provide coverage outbound from Jupiter post JOI. After the DMS anomaly, the MAG team decided not to risk the Io opt/avg data embedded in the Io LRS recording. Since it was too late to have the command removed from the JOI sequence when the DMS anomaly occurred, the MAG team set the opt/avg to take 16 hour avg in the JOI sequence. This second on command reset the time tag and began overwriting the Io data until the data was read out on Dec 30. The Io raw data was made redundant when the recorded data was successfully returned during the J0 and G1 cruise playbacks. The Jupiter approach and J0C data are the only data acquired during those times.
The EDR files were delivered to the Galileo Magnetometer Team by the Galileo project. The EDR files are given in IBM 370 binary representation and are stored in an an extremely compact format. The structure of the EDR files is completely described in the documents GLL280 and GLL640. The pages pertinent to the MAG description have been scanned into bit map images (TIFF) that are stored in the DOCUMENT directory off the root of this volume. The EDR files are named to correspond to the date of acquisition of the data The first letter of each file name is T followed by the year and doy (TYYDOY) that the memory readout of the data was done. If two files would have been readout on the same day a letter starting at "A" would be appended to the end to show sequence.
Mission description
Instrument Host description
MAG Instrument document
Dataset description
MAG References
S/C Events that impact MAG
Trajectory Data
Geometry Information
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