ESM 266: Passive microwave remote sensing. Jeff Dozier. Frequency-wavelength relation. Generally in the microwave part of the spectrum we use frequency instead of wavelength Typically measured in s –1 , called Hertz (Hz) Most often Gigahertz (GHz) = 10 9 Hz. Microwave band codes.
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Planck radiation at20,000 GHz is 36,000greater than at 37 GHz,so pixels at lower frequenciesmust be bigger
Sea ice, 18 Jan 2003
Motion vectors, 10hrs
(photos by Bill Ingalls)
Humidity Sounder for Brazil (HSB)
Atmospheric Infrared Sounder (AIRS)
Advanced Microwave Sounding Unit (AMSU; two units)
Launch of a radiosonde
a. Data from all 2378 AIRS infrared channels for one footprint off the west coast of South Africa, June 13, 2002, 1:30 UTC.
500 1000 1500 2000 2500 wavenumber (cm-1)
20 10 6.7 5 4 wavelength (m)
b. Detail showing the leftmost 128 of the 2378 channels in plot a.
AMSU Ch. 2 (31.4 GHz)
AMSU Ch. 3 (50.3 GHz)
AMSU Ch. 4 (52.8 GHz)
AMSU Ch. 5 (53.94 GHz)
HSB Ch. 2 (150 GHz)
HSB Ch. 3 (183±1 GHz)
HSB Ch. 4 (183±3 GHz)
HSB Ch. 5 (183±7 GHz)
South central U.S.
HSB 150 GHz data
AIRS Visible/Near IR data
(images courtesy of the AIRS Science Team)
Surface Conditions from AMSU
Moisture Streams from HSB
(image courtesy of NASDA)
AMSR-E image, 2:26 a.m. Japan Standard Time (JST).
TMI Total Rainfall
AMSR-E Total Rainfall
(images courtesy of Chris Kummerow and Bob Adler)
Ice extent deviations from the Nimbus 7 SMMR and DMSP SSMI
(extended from Parkinson et al., 1999)