Field Name Length (bits) Bit Contents Description
Item Total Algn Off
exposureTeHistogram 416416 32 0 telemetry Packet Exposure Record, Timed Exposure, Histogram Mode (see table 19, swreq Rev. I)
  header 6464 32 0 telemetry Header Telemetry Packet Header
    synch 3232 32 0 uint32 = 0x736f4166 This field delimits the start of a telemetry packet.
    telemetryLength 1010 1 32 uint10 = 13 This field indicates the total number of 32-bit words in the telemetry packet
    formatTag 66 1 42 uint6 = 18 This field identifies the content of the telemetry packet [see enum TlmFormatTag]: TTAG_SCI_TE_REC_HIST
    sequenceNumber 1616 1 48 uint16 This field is the sequence number of the telemetry packet
  runStartTime 3232 32 64 uint32 Science timestamp counter value at start of science run
  parameterBlockId 3232 32 96 uint32 Timed Exposure Parameter Block's Identifier field
  startExposureNumber 3232 32 128 uint32 The first Exposure Number used to produce the histogram
  endExposureNumber 3232 32 160 uint32 The last Exposure Number used to produce the histogram
  exposureCount 3232 32 192 uint32 Number of exposures, minus 1, accumulated in the histogram (required since some exposures between first and last may have been discarded by the FEP)
  outputNodeId 22 1 224 uint2 Identify which CCD output node produced the histogram [see enum QuadId]
  ccdId 44 1 226 uint4 Identify which CCD produced the data [see enum CcdId]
  fepId 33 1 230 uint3 Identify which FEP processed the data [see enum FepId]
  fepTimestamp 2525 32 256 uint25 Fep Timestamp when FEP received Beginning of Frame mark of the first exposure
  minimumOverclock 1616 16 288 uint16 Minimum overclock pixel value
  maximumOverclock 1616 16 304 uint16 Maximum overclock pixel value
  meanOverclock 1616 16 320 uint16 Mean value of all overclock pixels
  varianceOverclockLow 3232 32 352 uint32 Least-significant 32-bits of 64-bit signed (2s complement) overclock variance
  varianceOverclockHigh 3232 32 384 int32 Most-significant 32-bits of 64-bit signed (2s complement) overclock variance