urn:nasa:pds:mess_ns_derived:data_cdr:ns_cdr_cts2011237zzz_dat 1.0 1.10.1.0 Product_Observational 2018-10-17 1.0 PDS4 migrated product. 2011-08-25T00:03:37Z 2011-08-25T23:58:51Z MESSENGER Mission urn:nasa:pds:context:investigation:mission.messenger data_to_investigation MESSENGER Spacecraft urn:nasa:pds:context:instrument_host:spacecraft.mess is_instrument_host Neutron Spectrometer Instrument urn:nasa:pds:context:instrument:ns.mess is_instrument Mercury Planet urn:nasa:pds:context:target:planet.mercury data_to_target Mercury Orbit 1/222718085 1/222804199 ns_cdr_counts ns_cdr_gen 1.0 ns_cdr_cts2011237zzz.dat 2015-11-02T11:20:27Z 0 1478 This table contains one set of counter data collected from the MESSENGER Neutron Spectrometer (NS) plus timing, spatial, and engineering information taken during the spectral collection period. A set is defined as all data with timestamps corresponding to a given day of year. 25 0 119 mission_elapsed_time 1 1 UnsignedMSB4 4 seconds Time tag in seconds of the start of the associated reporting/accumulation period. utc_time 2 5 ASCII_String 19 UTC time at start of data collection. Format: YYYY-MM-DDTHH:MM:SS. utc_time_julday 3 24 IEEE754MSBDouble 8 UTC time at start of data collection given in Julian day. orbit_number 4 32 UnsignedMSB4 4 Unique identifier for a given orbit of MESSENGER around Mercury. Orbit number is defined as starting at apoherm and is calculated using the MET value and the appropriate SPICE kernels (see GEOMETRY/geominfo.txt). Orbit numbering does not start until MESSENGER performs the Mercury orbit insertion. Until that time the value for orbit number is 0. actual_accum 5 36 UnsignedMSB4 4 seconds Actual accumulation period in seconds for software counters and energy histograms. sc_altitude 6 40 IEEE754MSBSingle 4 km Spacecraft altitude above the subsatellite point on the target in units of km. sc_latitude 7 44 IEEE754MSBSingle 4 degree Target-centric latitude of the spacecraft subsatellite point in degrees. sc_longitude 8 48 IEEE754MSBSingle 4 degree Target-centric longitude of the spacecraft subsatellite point in degrees. lg1_raw_events 9 52 IEEE754MSBSingle 4 counts/second LG1 raw events in counts per second. lg2_raw_events 10 56 IEEE754MSBSingle 4 counts/second LG2 raw events in counts per second. bp_raw_events 11 60 IEEE754MSBSingle 4 counts/second BP raw events in counts per second. sw_total_events 12 64 IEEE754MSBSingle 4 counts/second Total software counts in counts per second. dead_time 13 68 IEEE754MSBSingle 4 counts Dead time counter in units of counts. lg1_reset 14 72 IEEE754MSBSingle 4 counts/second LG1 resets in counts per second. lg2_reset 15 76 IEEE754MSBSingle 4 counts/second LG2 resets in counts per second. bp_reset 16 80 IEEE754MSBSingle 4 counts/second BP resets in counts per second. bpp_lgxs 17 84 IEEE754MSBSingle 4 counts/second Fast neutrons moderated in the borated plastic but captured in the lithium glass. LG1 and LG2 are combined, thus the LGX designation. lg1_over_range 18 88 IEEE754MSBSingle 4 counts/second LG1 over range counts per second. lg2_over_range 19 92 IEEE754MSBSingle 4 counts/second LG2 over range counts per second. bp_over_range 20 96 IEEE754MSBSingle 4 counts/second BP over range counts per second. lg1_bpp_coin 21 100 IEEE754MSBSingle 4 counts/second Number of LG1-prompt BP coincidence counts per second. lg2_bpp_coin 22 104 IEEE754MSBSingle 4 counts/second Number of LG2-prompt BP coincidence counts per second. lg1_bpp_lg2_coin 23 108 IEEE754MSBSingle 4 counts/second Number of LG1-LG2-prompt BP triple coincidence counts per second. tc_early 24 112 IEEE754MSBSingle 4 counts/second Number of time correlated early counts per second. tc_late 25 116 IEEE754MSBSingle 4 counts/second Number of time correlated late counts per second. ns_cdr_cts2011237zzz.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed