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Diviner



  About DIVINER

Diviner Lunar Radiometer Experiment (DLRE) is a multi-channel solar reflectance and infrared radiometer. It will be the first instrument to create detailed, global maps of surface temperature over the lunar day and year. Diviner's measurements also will be used to map compositional variations, derive subsurface temperatures, assess the stability of potential polar ice deposits, and infer landing hazards such as roughness and rock abundance.

  Measurement Goals

The objective of Diviner is to measure lunar surface temperatures at scales that provide essential information for future surface operations and exploration. The temperature of the lunar surface and subsurface is a critical environmental parameter for future human and robotic exploration. While the Apollo missions were all targeted to equatorial landing sites and were only conducted during the lunar day, NASA's new lunar exploration program will involve exploration of a much wider range of latitudes, and astronaut stays of longer than two weeks. Both types of missions involve considerably more challenging thermal environments, and will benefit greatly from a comprehensive global thermal mapping dataset that Diviner will provide. A key objective is to determine the temperatures within permanently shadowed areas (which could be well below 100K [-279oF]) to understand the potential of these areas to harbor water ice. Orbital thermal mapping measurements also provide detailed information about hazards to landing and surface exploration, such as rough terrain and rocks.

Diviner Instrument

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  Principal Investigator

  • , Earth and Space Science Dept., University of California Los Angeles, CA

  Instrumentation

The Diviner instrument is a multi-channel solar reflectance and infrared radiometer. It will operate primarily in a nadir-pointed pushbroom mode, building up detailed, global maps of surface reflectivity and temperature over the lunar day and year.

Diviner will collect data in nine spectral channels at scales as small as 300 m and in wavelength bands covering 0.35 to 400 microns, including two solar reflectance bands, four thermal, and three narrow bands near 8 microns for compositional studies. The channels are distributed between two co-aligned telescopes which are mounted on a motor-driven elevation/azimuth yoke. The two-dimensional pointing capability will be used to view space, an internal blackbody, and a solar target for radiometric calibration.


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