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MODIS Web Organigram

MCST Calibration Information

Emissive Bands

MODIS has 16 Emissive Bands (Bands 20-25 and bands 27-36), each with a 1 km ground resolution and wavelengths ranging from 3.75mm to 14.235mm.

Key Uses of the MODIS Emissive Bands
  BAND
Cloud Fraction
Cloud Height
Cloud Temperature
Forest Fires & Volcanoes
Mid Troposphere Humidity
Sea Surface Temperature
Surface Temperature
Total Ozone
Troposphere Temperature
Upper Troposphere Humidity		 24, 25, 33, 34, 35, 36
32, 33, 34, 35, 36
22, 23, 31
21, 31, 32
27
20
22, 23, 29, 31, 32
30
24, 25
28

 

L1B Emissive Calibration

The MODIS emissive calibration algorithm is designed to determine the at-aperture spectral radiance of the Earth scene with its 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 Emissive band calibration data flow

The RED 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 On-board Blackbody and Space View are used every scan to calibrate the emissive bands. The on-orbit emissive band MODIS calibration is a two point method which fits a nonlinear response by using pre-launch measurements.

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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