USGS Astrogeology: Clementine Archive of EDR Image Data Products

Clementine Archive of EDR Image Data Products

The delivery of the Clementine EDR Image Archive to the science community is scheduled for April, 1995 (timed to the release of the LADAP research announcment). More than 1.7 million images are contained on the archive. Volumes contain 3 to 5 lunar orbits depending on the size of each orbit. The first volume in the series begins with orbit 32--the start of the lunar mapping phase of the mission. The Low-Earth orbit, earth-phasing-loops, and lunar orbit data acquired during the check-out phase (orbits 1-32) are stored on volumes at the end of the volume series.

Each Clementine EDR data product consists of a single camera observation stored in a data file on the archive. The image data have been depacketized and reformatted with standard PDS labels, but are otherwise "raw". Raw data contain the geometric and radiometric characteristics of unprocessed and unrectified data. To make full utilization of the data, it is necessary to perform radiometric and geometric processing on the images.

The Clementine images were compressed onboard the spacecraft using a space-hardened Matra chip. The compression enabled acquisition of many more observations of the Moon. The compression technique performed "lossy" compression using a Discrete Cosine Transform (DCT) algorithm. The images were kept in the compressed format when archived to reduce the total volume of the archive collection. Software is available on the CD-ROM volumes to decompress the image data products

Documents Describing the Clementine EDR Image Archive

The documents shown below are found on the Clementine EDR Image Archive and contain detailed descriptions of the contents and organization of the data volumes.

To find out how to order the Archive of Clementine EDR data products, please contact:

Eric M. Eliason (Planetary Data System, U.S. Geological Survey) eeliason@sirius.wr.usgs.gov - telephone: (602)556-7113