Chandrayaan-1 M3
ODE: Moon
Mission: ISRO's Chandrayaan-1
Instrument: M3
PDS Imaging Node: PDS Source Information
PDS Archives: PDS Archive
Search ISRO's Chandrayaan-1 M3 data in Lunar ODE: Product Search • Map Search
The Moon Mineralogy Mapper (M3) is one of two instruments that NASA is contributed to India's first mission to the Moon, Chandrayaan-1 (meaning "Lunar Craft" in ancient Sanskrit), which launched on October 22, 2008. M3 was a state-of-the-art imaging spectrometer that provided the first map of the entire lunar surface at high spatial and spectral resolution, revealing the minerals of which it is made.
The Moon Mineralogy Mapper (M3) was selected as a NASA Discovery Mission of Opportunity in February 2005. The M3 instrument was launched on October 22, 2008 at 00:52:02 UTC from Shriharikota in India on board the Indian Space Research Organization (ISRO) Chandrayaan-1 spacecraft for a nominal two-year mission in a 100 km polar orbit. The M3 instrument is a high uniformity and high signal-to-noise ratio imaging spectrometer that operates in the solar dominated portion of the electromagnetic spectrum with wavelengths from 430 nm to 3000 nm (0.43 to 3.0 microns) in a high-resolution Target Mode and in a reduced-resolution Global Mode. Target Mode pixel sizes are nominally 70 meters and Global pixels (binned 2 by 2) are 140 meters, from the planned 100 km orbit.
Key M3 Measurement Characteristics
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Spectral
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Range 430 to 3000 nm
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Sampling 10 nm constant
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Response FWHM <15 nm
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Radiometric
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Range 0 to specified saturation
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Sampling 12 bits measured,
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Response Linear to 1%
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Accuracy Within 10% absolute
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Precision (SNR) >400 @equatorial reference
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>100 @polar reference
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Spatial
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Range 24 degree field-of-view
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Sampling 0.7 milliradian
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Response FWHM < 1.0 milliradian
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Uniformity
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Spectral-cross-track < 10% variation of spectral position across the field-of-view
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Spectral-IFOV < 10% IFOV variation over the spectral range
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M3 Products
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Type |
Description |
Data Set |
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Raw camera image (Level 0). More information: |
CH1-ORB-L-M3-2-L0-RAW-V1.0 (in CH1M3_0001 and CH1M3_0002 subdirectories) |
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Calibrated Image Version 1 (Level 1B) - Radiometrically-calibrated, pixel-location spectral images More information: |
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Calibrated Image Version 2 (Level 1B) - Radiometrically-calibrated, pixel-location spectral images More information: |
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Calibrated Image Version 3 (Level 1B) - Radiometrically-calibrated, pixel-location spectral images More information: |
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Reflectance Image (Level 2) - Includes photometrically calibrated, pixel-located reflectance spectral images More information: |
Additional M3 Resources
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M3 ENVI User's Guide (PDF)
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Working with M3 Data (PDF) <- Includes description of calibrated image processing
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Working with M3 L1B Data (PDF)
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M3 Data Tutorial (PDF)
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Image Display and Analysis Software - ENVI/IDL: The commercial software packages ENVI and IDL can be used to display and analyze Level 0, Level 1B and Level 2 data products (suffix *.IMG). ENVI and IDL are distributed by Harris Geospatial Solutions. M3 data products are in no way in any proprietary format. Instead they are arranged as simply and as openly as possible. See the Product SIS section 1.5 for more information.