THEMIS SOCScience Data Products − 1December 10, 2005 Data Products Timothy Quinn

THEMIS SOCScience Data Products − 2December 10, 2005 Level 0 (L0) Data File The L0 data files will:  Contain single AppID packet type  Cover a 24 hour period  Be time ordered  Have overlap deleted  Remain compressed  Contain a 1024 byte ancillary data header

THEMIS SOCScience Data Products − 3December 10, 2005 Level 0 (L0) Data File Header (1024x8 ) Packet (Nx8) Packet (Nx8) Packet (Nx8) Packet (Nx8) Packet (Nx8) 1024 Byte File Header: Bytes 0-19: A 20-byte identifier (could be ASCII) which denotes this as a THEMIS L0 APID file. Bytes 20-23: Four binary bytes with SCID in long, unsigned integer format (MSB first). Bytes 24-27: Four binary bytes with APID in long, unsigned integer format. Bytes 28-31: Four binary bytes with the number of packets in long, unsigned integer format (MSB first). Bytes 32-35: Four binary bytes in 32-bit unsigned MSB format containing the full 4-digit year of the Start Date. Bytes 36-39: Four binary bytes in 32-bit unsigned MSB format containing the Month (1-12) of the Start Date. Bytes 40-43: Four binary bytes in 32-bit unsigned MSB format containing the Day-of-Month (1-31) of the Start Date. Bytes 44-47: Four binary bytes in 32-bit unsigned MSB format containing the version number of the file. Bytes : TBD Packet Size: Nx8, where N is based on APID

THEMIS SOCScience Data Products − 4December 10, 2005 Level 1 (L1) Data Products L1 Probe State File (CDF Format) This will include: Probe Position (GEI Coordinates) Probe Velocity (GEI Coordinates) Probe Spin Axis Attitude (GEI Coordinates)

THEMIS SOCScience Data Products − 5December 10, 2005 Level 1 (L1) Data Products L1 Calibration Data Files(ASCII or CDF Format) This will include: FGM Mounting Orthogonality and Gain FGM Boom Angles SCM Boom Angles SCM Gains ESA MCP Gains, one per anode for 16 anodes x 2 heads SST Gains, 3 per telescope x 4 telescopes x 2 shutter conditions (open/closed EFI 1 current and 3 voltages per sensor x 6 sensors

THEMIS SOCScience Data Products − 6December 10, 2005 Level 1 (L1) Data Products L1 Data File(CDF Format) The CDF data files will: Contain ALL APIDs Cover a 24 hour period Be uncalibrated The end user will process this file using the other L1 products, UCB software, and GSFC/NSSDC CDF software to produce physical quantities: (L1 Products)x(NSSDC/CDF S/W)x(UCB S/W)=Physical Quantities

THEMIS SOCScience Data Products − 7December 10, 2005 Level 2 Data Products Key Parameter Data Sets These will include the following in CDF format: 3-D magnetic field, DC waveforms and AC spectrograms 3-D electric field, DC waveforms and AC spectrograms, probe electric potential Core (10 eV - 40 keV) ion density and velocity moments, temperature and pressure tensor, energy spectrogram Core (5 eV-30 keV) electron temperature and pressure tensor, energy spectrogram Energetic ion and electron fluxes GMAG Activity Index Keograms (Ground image summaries)

THEMIS SOCScience Data Products − 8December 10, 2005 Summary ProductRequired S/WDistribution Medium Level 0 (L0)Instrument Team IDL UCB C-Library UCB LAN Level 1 (L1)UCB and CDF S/WCD/DVD to Co-I UCB Website UCB LAN Key Parameter (KP)CDF S/W or UCB and CDF S/W UCB Website VMO CDAWEB Summary PlotsImage Viewing S/WUCB Website