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MODIS Web Organigram

MCST Calibration Information

Reflective Bands


MODIS has 20 Reflective Bands (Bands 1-19, and Bands 26), with wavelengths ranging from 0.412mm to 1.375mm and a ground resolution of 250m, 500m, or 1km (band dependent).

 

Key Uses of the MODIS Reflective Bands
  BAND
Absolute Land Cover Transformation
Aerosol Properties
Atmosphere
Atmospheric Properties
Chlorophyll
Chlorophyll Fluorescence
Cloud Fraction (Thin Cirrus)
Cloud Properties
Cloud Amount
Green Vegetation
Land Properties
Leaf/Canopy Differences
Sediments
Snow/Cloud Differences
Soil/Vegetation Differences
Troposhere Temperature
Vegetation Chlorophyll
Vegetation Land Cover Transformation 		1
15 ,16
13h, 13l
16, 17, 18, 19
8, 9, 10, 11
14h, 14l
26
7, 17, 18, 19
2
4
7
5
12, 13h, 13l
6
3
26
1
2

 

L1B Reflective Calibration

The MODIS reflective calibration algorithm is designed to determine the at-aperture spectral radiance of the Earth scene and the bidirectional reflectance of the Earth scene with their respective associated uncertainties. Level 1A data is Earth-located raw sensor digital numbers and Level 1B data is Earth-located, calibrated data in physical units.

Schematic of MODIS Reflective Band Calibration Data Flow

The BLUE print (upper half of figure) denotes parameters which change every scan.
The BLACK print (lower half of figure) denotes periodic or pre-launch determined parameters.

 

The Solar Diffuser, SpectroRadiometric Calibration Assembly (SRCA) and Space View are used periodically to determine calibration coefficients for the reflective bands. The Space View is used every scan along with the periodic calibration results to calibrate the reflective bands. The on-orbit reflective band calibration is a one-point method adjusted by data from a two-point periodic method to fit a linear detector response.

Schematic of MODIS On-Board Calibration Sources

Responsible Civil Servant: 
Dr. Jack Xiong <Xiaoxiong.Xiong.1@gsfc.nasa.gov>

Email mcst-webm@ssaihq.com to report any problem with the MCST Web Pages.

Last Update:  July 1, 2008

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