LRO DIVINER Reduced Data Record (RDR)

RDR – Reduced Data Record (See Tools: DIVINER RDR Query Tool)

Instrument: Diviner Lunar Radar Experiment

PDS Data Set ID: LRO-L-DLRE-4-RDR-V1.0

For more information about Diviner RDR products, see the RDR and Derived Product SIS.

For more information about all Diviner products, see the Diviner Archive SIS.

Every 2.048 seconds the Diviner Lunar Radar Experiment collects a data “frame” containing the following:

  • 16 sets of science data, with each set containing 192 sixteen-bit science measurements from the focal plane interface electronics obtained over integration periods of 0.128 seconds

  • A single set of instrument engineering and housekeeping measurements (or “engineering data”) acquired during the 2.048 second interval

The Reduced Data Record (RDR) data tables are produced directly from the Experiment Data Record (EDR) data tables using Diviner software, geometry, and ephemeris data provided by the LRO project.

Each Diviner RDR data product consists of two files. The first file is an ASCII formatted detached PDS label. The second file is the ASCII data table file. Unlike the EDR data tables, which contain values for each of the 189 detectors in a single record (every 0.128 seconds), the RDR data tables have one record per detector. Therefore, for every EDR record there are 189 detector-specific RDR records, each with the same “date” and “utc” time as the original EDR record. Each RDR data table covers ten minutes of time, one-sixth of the EDR data tables.

The RDR data product is considered to be foremost of scientific interest, and thus contains a minimal representation of engineering and housekeeping data needed to verify instrument status and data quality.

Diviner RDR products have the following file names:

yyyymmddhh_RDR.TAB (with detached PDS label)


yyyymmdd = 8-digit date

hh = 2-digit hour. The hour represents the beginning of the one-hour period in which the data were taken.*

*Please note that some records may contain times that fall slightly outside of the one-hour range. This is due to the desire to keep all records that arrive in the same data frame together in the same file. Thus records may have a time of just before the hour given in the file name, or just after the end of said hour, to a maximum difference of 2.048 seconds.

In ODE, RDR products have the following product IDs: