urn:nasa:pds:mess_ns_raw:data_edr:ns_evt2012144zzz_dat 1.0 1.10.1.0 Product_Observational 2018-06-08 1.0 PDS4 migrated product 2012-05-23T00:00:07Z 2012-05-23T23:59:40Z 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 Year 2 1/246218673 1/246305046 ns_events pipe-ns2edr 1.0 ns_evt2012144zzz.dat 2012-05-24T02:59:30Z 0 1995 This table contains one set of events data collected from the MESSENGER Neutron Spectrometer. A set is defined as all data with timestamps corresponding to a given Earth day. Additional details are contained in the EDR SIS document. 3 3 1538 met 1 1 UnsignedMSB4 4 Time tag in seconds of the start of the associated reporting/accumulation period. orbit_number 2 5 UnsignedMSB2 2 Orbit number is a unique identifier for a given orbit of the MESSENGER spacecraft around Mercury. Orbit number is defined as starting at apoherm and is calculated using the MET value and the appropriate SPICE kernels. Orbit numbering does not start until MESSENGER performs the Mercury orbit insertion. Until that time the value for orbit number is 0. evt_mode_len 3 7 UnsignedMSB2 2 Event mode data length. This specifies the N number of items containing data in the following event mode data fields. Event mode data length is commandable and can vary from 0-255. 1 255 1 0 9 510 evt_mode_ttsp 1 1 UnsignedMSB2 2 Event mode data for Time-To-Second-Pulse (TTSP) values. The Ith item in the TTSP field is the TTSP for the Ith correlated time event. If EVT_MODE_LEN is less than 255 then the item columns greater than N do not contain valid data and will default to 0. 2 255 1 0 519 510 evt_mode_bpp 1 1 UnsignedMSB2 2 Event mode data containing the BPP event energies, in raw ADC units. The Nth item corresponds to the prompt energy of the Nth time-correlated event. If EVT_MODE_LEN is less than 255 then the item columns greater than N do not contain valid data and will default to 0. 3 255 1 0 1029 510 evt_mode_bps 1 1 UnsignedMSB2 2 Event mode data containing the BPS event energies, in raw ADC units. The Nth item in the field corresponds to the delayed-deposited energies of the Nth time-correlated event. If EVT_MODE_LEN is less than 255 then the item columns greater than N do not contain valid data and will default to 0. ns_evt2012144zzz.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed