OBJECT = COLUMN NAME = SCLK_SECOND DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 1 BYTES = 4 DESCRIPTION = "Spacecraft clock counter of onboard seconds, since the epoch of May 3, 2003 (123)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCLK_PARTITION DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 5 BYTES = 2 DESCRIPTION = "Spacecraft clock counter partition of onboard counter roll-over/reset. Zero or one indicates the counter is in the first partition. See the NAIF Spice documentation." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCLK_FINE DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 7 BYTES = 2 DESCRIPTION = "Spacecraft clock counter of onboard fractions of a second with one fraction being 1/65536." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCET_DAYS DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 9 BYTES = 4 DESCRIPTION = "Spacecraft event time in days since 1958-001T00:00:00Z. This is the historical epoch used since the launch of the first U.S. satellite Explorer I with Dr. James Van Allen's (University of Iowa) cosmic-ray instrument as the principal element of the payload, resulting in the discovery of the Van Allen Radiation Belts." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCET_MSEC DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 13 BYTES = 4 DESCRIPTION = "Spacecraft event time in milliseconds of day. SCET_DAYS and SCET_MSEC are provided to accurately time tag the data in UTC without the need for calls to the spice kernel." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCET_STRING DATA_TYPE = CHARACTER START_BYTE = 25 BYTES = 24 DESCRIPTION = "Spacecraft event time in UTC in human readable ASCII format." END_OBJECT = COLUMN OBJECT = COLUMN NAME = PROCESS_ID DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 49 BYTES = 1 DESCRIPTION = "The seven bits from the 20,3 telemetry packet header which determine the instrument process id. 0x4D (77d) = Subsurface Sounder (SS1 to SS4) 0x4E (78d) = Active Ionospheric Sounder (AIS) 0x4F (79d) = Calibration (CAL) 0x50 (80d) = Receive Only (RCV)" END_OBJECT = COLUMN OBJECT = COLUMN NAME = INSTRUMENT_MODE DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 50 BYTES = 1 DESCRIPTION = "The bits from the 20,3 telemetry packet header used to determine the instrument data type and mode selection." OBJECT = BIT_COLUMN NAME = DATA_TYPE BIT_DATA_TYPE = MSB_UNSIGNED_INTEGER START_BIT = 1 BITS = 4 DESCRIPTION = " 0001 = AIS, Calibration, or Receive Only 0000 = SS1-SS5 Individual Echoes 0010 = SS1-SS5 Acquisition 0011 = SS1-SS5 Tracking " END_OBJECT = BIT_COLUMN OBJECT = BIT_COLUMN NAME = MODE_SELECTION BIT_DATA_TYPE = MSB_UNSIGNED_INTEGER START_BIT = 5 BITS = 4 DESCRIPTION = " 0101 = Calibration 0110 = Receive Only 0111 = Active Ionospheric Sounder 1000 = Subsurface Sounder 1 1001 = Subsurface Sounder 2 1010 = Subsurface Sounder 3 1011 = Subsurface Sounder 4 1100 = Subsurface Sounder 5 " END_OBJECT = BIT_COLUMN END_OBJECT = COLUMN OBJECT = COLUMN NAME = TRANSMIT_POWER DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 60 BYTES = 1 DESCRIPTION = "The transmit power level, expressed as the power supply regulation voltage for the final power amplifier output. 0x00 (0d) = minimum transmit power 2.5V 0x0F (15d) = maximum transmit power 40.0V " END_OBJECT = COLUMN OBJECT = COLUMN NAME = FREQUENCY_TABLE_NUMBER DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 61 BYTES = 1 DESCRIPTION = "The Active Ionospheric Sounder may select one of sixteen frequency tables to use during transmit. Each table has 160 frequencies that are transmitted during an AIS capture. Table 0 is the default table." END_OBJECT = COLUMN OBJECT = COLUMN NAME = FREQUENCY_NUMBER DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 62 BYTES = 1 DESCRIPTION = "The frequency number from the table, ranging from 0 to 159." END_OBJECT = COLUMN OBJECT = COLUMN NAME = BAND_NUMBER DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 63 BYTES = 1 DESCRIPTION = "The band that was selected to receive the echo. 0 = band 0 3 = band 3 1 = band 1 4 = band 4 2 = band 2" END_OBJECT = COLUMN OBJECT = COLUMN NAME = RECEIVER_ATTENUATION DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 64 BYTES = 1 DESCRIPTION = "The receiver attenuation for band selected measured in dB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = FREQUENCY DATA_TYPE = IEEE_REAL START_BYTE = 77 BYTES = 4 UNIT = HZ DESCRIPTION = "The frequency of the transmit pulse" END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPECTRAL_DENSITY DATA_TYPE = IEEE_REAL START_BYTE = 81 BYTES = 320 ITEMS = 80 ITEM_BYTES = 4 UNIT = "VOLT**2/M**2/HZ" DESCRIPTION = "A series of calibrated spectral densities from a single transmit pulse," END_OBJECT = COLUMN