CLEM LIDAR

ODE:Moon

Mission: Clementine

Search Clementine LIDAR data in Lunar ODE: Product Search • Map Search

The Clementine Laser Image Detection and Ranging (LIDAR) unit shared the telescope of the HiRes camera, splitting the 1064 nm return signal from the Nd-yttrium-aluminum-garnet (Yag) source off to an avalanche photodiode (APD) detector with a dichroic filter. Range was determined by the number of clock cycles since a laser output start pulse was received. The clock counter had only 14 bits, owing to the hardware limitations. In order to allow returns up to the 640 km maximum range required in the lunar orbit, returns from the discriminator were binned 4 to a clock count, turning the 23 MHz response into a 39.972 meter height bin. Internal memory in the LIDAR unit saved up to 6 "returns" per laser firing, with up to 4 saved between programmable search range minimum/maximum values. Threshold was set for the best compromise between missed detection and false alarms.

The Clementine lidar data set has been migrated to the PDS4 standard. The original PDS3 data products, labels, and documentation remain available in their original archive volume. The only change is that PDS4 labels and documentation have been added to the archives. The original data files are unchanged. Please see geo_notes_and_errata.pdf for more information.

LIDAR Products that use the PDS4 standard:

Processing Level	Product Type	Description	PDS4 Bundle / Collection
Raw Data	TOPO	Collection of the LIDAR data of the Deep Space Program Science Experiment (Clementine 1) More Information: PDS3 catalog file that describes the LIDAR data set, parameters, processing, data coverage/quality PDS3 Volume Information File	urn:nasa:pds:clementine1_lidar
Derived Data	TAB	Collection of the topography data of the Deep Space Program Science Experiment (Clementine 1). More Information: RDR Product Software Interface Specification (SIS) PDS3 Volume Information File LIDAR Data Processing Description	urn:nasa:pds:clementine1_gravity_and_topography:topography_data
Derived Data	MAP	Collection of the topography map (image) data of the Deep Space Program Science Experiment (Clementine 1). More Information: RDR Product Software Interface Specification (SIS) PDS3 Volume Information File LIDAR Data Processing Description	urn:nasa:pds:clementine1_gravity_and_topography:gravity_map

ODE supports the search, retrieval, and download of LIDAR topography raw and derived data products. Information about LIDAR products can be found in

• Readme files for PDS4 Bundles of the Clementine 1: LIDAR dataset and Clementine 1: Gravity and Topography Model dataset

• Notes and Errata Regarding PDS3-to-PDS4 Migration of Deep Space Program Science Experiment (Clementine-1) Data Archived at the PDS Geosciences Node

• LIDAR PDS3 Catalog File