README for STEREO SEP instrument suite Level 0 and ancillary data
available via anonymous ftp from
ftp://mussel.srl.caltech.edu/pub/STEREO/Level0

These directories contain Level 0 and attitude/orbit data from the
two STEREO spacecraft ("ahead" and "behind").

Data files are binary files containing raw telemetry packets in Payload
Telemetry Packet (PTP) format. There are separate files for each day.

Data files will remain available on the ftp site for 60 days.

For each day:
   Packets are extracted from IMPACT Level 0 data files and sorted into
   smaller files for each SEP instrument.
   In addition, the following packets are included in all files:
	SEP Housekeeping packet (apid 0x241)
	SEP Command Response packet (apid 0x240)
	IMPACT Beacon packet (apid 0x270)
   The above three packet-types are also available on their own,
   in a separate file.
   In addition, a single file is provided containing all the SEP science,
   HK, CmdResponse and Beacon packets.

The directory structure is laid out as follows:

Mission: Post-launch mission data
   |
   ---ahead: data from the Ahead spacecraft
   |    |
   |	---SEP: files containing all the SEP-suite science packets,
   |    |       plus HK, CmdResponse and Beacon packets
   |	|
   |	---HET: files containing all the HET science packets,
   |    |       plus HK, CmdResponse and Beacon packets
   |	|
   |	---LET: files containing all the LET science packets,
   |    |       plus HK, CmdResponse and Beacon packets
   |	|
   |	---SEPT: files containing all the SEPT science packets,
   |    |        plus HK, CmdResponse and Beacon packets
   |	|
   |    ---SIT: files containing all the SIT science packets,
   |    |       plus HK, CmdResponse and Beacon packets,
        |       plus files containing hex dumps of same
   |    |
   |	---MISC: files containing just the HK, CmdResponse and Beacon packets
   |
   ---behind: data from the Behind spacecraft
   |    |
   |	---SEP: as above
   |	|
   |	---HET: as above
   |	|
   |	---LET: as above
   |	|
   |	---SEPT: as above
   |	|
   |    ---SIT: as above
   |    |
   |	---MISC: as above
   |
MissionSim: Pre-launch mission simulation data
   |
   ---Same directory tree as for "Mission"
   |
Ancillary: attitude/orbit data, to be described later
   |
Quicklook: Beacon data in PTP format, received in near-real-time from NOAA
           tracking stations, via the SSC

