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MODIS Calibration General Information

The MODIS Characterization Support Team (MCST) is dedicated to the production of a high quality MODIS calibration product. This product is a precursor to every geophysical science product. MCST works for the Science Team Leader and is responsible for developing and maintaining the calibration product (L1B algorithm). MCST is responsible for developing the physical basis for sensor calibration.

The Moderate Resolution Imaging Spectroradiometer (MODIS), is an imaging radiometer employing multiple in-track detectors and a cross-track scan mirror and collecting optics, and a set of individual detector elements which will provide imagery of the Earth’s surface and cloud cover in 36 discrete spectral bands. Contiguous scan swaths of 2330km in cross-track by 10km in-track are acquired to provide 2-day repeat observations of the Earth. Its task is to develop a detailed understanding of the Earth and the dynamics of global change.

MODIS is the keystone instrument on the Terra mission, launched on December 18, 1999, and also on the Aqua mission, launched May 4, 2002. The EOS Project is designed to collect data for 15 years in order to differentiate short-term and long-term trends, as well as, regional and global phenomena.

MODIS Instrument Views

MODIS External cutaway

 

Exploded View of MODIS Subsystems

MODIS Subsystems

MODIS Specifications

Primary UseBandBandwidth1Spectral
Radiance2
Required
SNR3
Land/Cloud/Aerosols
Boundaries
1620 - 67021.8128
2841 - 87624.7201
Land/Cloud/Aerosols
Properties
3459 - 47935.3243
4545 - 56529.0228
51230 - 12505.474
61628 - 16527.3275
72105 - 21551.0110
Ocean Color/
Phytoplankton/
Biogeochemistry
8405 - 42044.9880
9438 - 44841.9838
10483 - 49332.1802
11526 - 53627.9754
12546 - 55621.0750
13662 - 6729.5910
14673 - 6838.71087
15743 - 75310.2586
16862 - 8776.2516
Atmospheric
Water Vapor
17890 - 92010.0167
18931 - 9413.657
19915 - 96515.0250
 
Primary UseBandBandwidth1Spectral
Radiance2
Required
NE[delta]T(K)4
Surface/Cloud
Temperature
203.660 - 3.8400.45(300K)0.05
213.929 - 3.9892.38(335K)2.00
223.929 - 3.9890.67(300K)0.07
234.020 - 4.0800.79(300K)0.07
Atmospheric
Temperature
244.433 - 4.4980.17(250K)0.25
254.482 - 4.5490.59(275K)0.25
Cirrus Clouds
Water Vapor
261.360 - 1.3906.00150(SNR)
276.535 - 6.8951.16(240K)0.25
287.175 - 7.4752.18(250K)0.25
Cloud Properties298.400 - 8.7009.58(300K)0.05
Ozone309.580 - 9.8803.69(250K)0.25
Surface/Cloud
Temperature
3110.780 - 11.2809.55(300K)0.05
3211.770 - 12.2708.94(300K)0.05
Cloud Top
Altitude
3313.185 - 13.4854.52(260K)0.25
3413.485 - 13.7853.76(250K)0.25
3513.785 - 14.0853.11(240K)0.25
3614.085 - 14.3852.08(220K)0.35
 
1 Bands 1 to 19 are in nm; Bands 20 to 36 are in µm
2 Spectral Radiance values are (W/m2 -µm-sr)
3 SNR = Signal-to-noise ratio
4 NE(delta)T = Noise-equivalent temperature difference

Note: Performance goal is 30-40% better than required