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Clementine Near-Infrared CCD Camera (NIR)

NSSDCA ID: 1994-004A-02

Mission Name: Clementine
Principal Investigator:Dr. Eugene M. Shoemaker

Description

The Clementine Near-Infrared camera (NIR) was designed to study the surfaces of the Moon and the near-Earth asteroid 1620 Geographos at six different wavelengths in the near-infrared spectrum. This experiment yielded information on the petrology of the surface material on the Moon. The rendezvous with Geographos was cancelled due to equipment malfunction.

The camera consisted of a catadioptric lens which focused on a mechanically-cooled (to a temperature of 70 K) Amber InSb CCD focal-plane array with a bandpass of 1100--2800 nm and a six-position filter wheel. The filter center wavelengths (and bandpass widths (FWHM)) were: 1100 nm (60 nm), 1250 nm (60 nm), 1500 nm (60 nm), 2000 nm (60 nm), 2600 nm (60 nm), and 2780 nm (120 nm). The aperture was 29 mm with a focal length of 96 mm. The field of view was 5.6 x 5.6 degrees, giving a cross-track width of about 40 km at a nominal 400 km lunar altitude. The Moon had complete mapping coverage during the two month lunar phase of the mission. The image array is 256 x 256 pixels, and pixel resolution varied from 150--500 m during a single orbit mapping run at the Moon. (At Geographos the pixel resolution would have been 40 m at closest approach, giving an image size about 10 x 10 Km.) The camera took twelve images in each 1.3 s image burst, which occured 75 times over the 80 minute mapping span during each five hour lunar orbit. The dynamic range was 15,000. The signal-to-noise ratio varied from 11--97 depending on the surface albedo and phase angle, with a relative calibration of 1% and an absolute calibration of 30%. The gain varied from 0.5 to 36x.

Alternate Names

  • Clementine/NIR
  • NIR
  • urn:nasa:pds:context:instrument:clem1.nir

Facts in Brief

Mass: 1.92 kg
Power (avg): 11 W
Bit rate (avg): 98.3 kbps

Funding Agencies

  • Department of Defense-Department of the Navy (United States)
  • NASA-Office of Space Science (United States)

Disciplines

  • Planetary Science: Small Bodies
  • Planetary Science: Geology and Geophysics

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Paul D. SpudisDeputy Team LeaderLunar and Planetary Institutespudis@lpi.usra.edu
Dr. Eugene M. ShoemakerTeam LeaderUS Geological Survey
Prof. Jacques E. BlamontTeam MemberCNRS, Service d'Aeronomie
Mr. Merton E. DaviesTeam MemberRand Corporation
Dr. David E. SmithTeam MemberNASA Goddard Space Flight Centerdavid.e.smith@nasa.gov
Dr. Daniel N. BakerTeam MemberNASA Goddard Space Flight Centerdaniel.baker@colorado.edu
Mr. Thomas C. DuxburyTeam MemberNASA Jet Propulsion Laboratorytduxbury@gmu.edu
Dr. Bonnie J. BurattiTeam MemberNASA Jet Propulsion Laboratorybburatti@scn1.jpl.nasa.gov
Dr. Carle M. PietersTeam MemberBrown Universitycarle_pieters@brown.edu
Mr. Charles H. ActonTeam MemberNASA Jet Propulsion Laboratorycacton@mail3.jpl.nasa.gov
Mr. Eric EliasonTeam MemberUS Geological Surveyeeliason@usgs.gov
Dr. Alfred S. McEwenTeam MemberUS Geological Surveymcewen@pirl.lpl.arizona.edu
Dr. Paul G. LuceyTeam MemberUniversity of Hawaiilucey@pgd.hawaii.edu

Selected References

  • Le Mouelic, S., et al., A new data reduction approach for the Clementine NIR data set: Application to Aristillus, Aristarchus and Kepler, J. Geophys. Res., 104, No. E2, 3833-3843, doi:10.1029/1998JE900035, Feb. 1999.
  • Priest, R. E., et al., Near-infrared camera for the Clementine mission, in Infrared Detectors and Instrumentation for Astronomy, Proc. SPIE Vol. 2475, 393-404, A. M. Fowler Ed., doi:10.1117/12.211287, Jun. 1995.

Related Data/Information at NSSDCA

Clementine EDR Image Archive
Clementine Lunar Digital Image Mosaic (LDIM) Basemaps

Clementine Mission Overview

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