LRO LEND PDS4 Housekeeping Data Experiment Data Record (EDRHK4)

EDRHK4 – PDS4 Housekeeping Data Experiment Data Record

Instrument: Lunar Exploration Neutron Detector

PDS3 Data Set ID: LRO-L-LEND-2-EDR-V1.0 DOI: 10.17189/1520637

PDS4 Bundle:urn:nasa:pds:lro_lend DOI: 10.17189/p89b-8w72

For more information about LEND raw products, see the EDR Product SIS.

For more information about the PDS3 volume, see the LEND Archive Volume SIS.

The Lunar Exploration Neutron Detector (LEND) PDS4 Housekeeping Data Experiment Data Record (EDRHK4) contains a time series of Neutron Detector housekeeping data.

A process termed “ingest” occurs on the LEND Science Operations Center computer which receives data from the LRO Mission Operator Center. The ingest process verifies the consistency of the data. The raw data product is output by software that maps the stored relational housekeeping data into the EDRHK4 raw product.

Time series datum in the LEND raw data product is sorted according to the value of the spacecraft clock. Time series records are tagged by spacecraft time which is the 5 MSB of the spacecraft clock, 4 bytes of seconds, and 1 byte of subsecond. The LEND Instrument contains its own internal clock. Values from this clock are also included; units are in 0.016 seconds since the last power on of the instrument.

LEND EDRHK4 products have the following file names:

LEND_EDR_HK_yyyymmdd.DAT (with detached PDS label)

where:

yyyymmdd = 8-digit date specifier

In ODE, LEND EDRHK4 products have the following product IDs:

LEND_EDR_HK_YYYYMMDD_DAT