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Summary

The Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) observed the
Earth in five frequencies at 6.6, 10.7, 18, 21, and 37 GHz in both
horizontal and vertical polarization. Each frequency has a bandwidth
of 250 MHz. The instrument was turned off on August 21, 1987
temporarily and was permanently turned off on July 6, ... 1988. The SMMR
instrument provided long-term microwave data on sea-surface
temperatures, rain rates over the ocenas, land brightness
temperatures, wind speed at the ocean surface, sea ice, and
atmospheric water vapor content.

The SMMR Calibrated Temperature Tape (TCT) data products at NSIDC consist of

. TCT radiances at footprint spatial resolution (78-098A-08W)

. TCT brightness temperatures on 1/2 x 1/2 degree grids (78-098A-08Y)

. TCT brightness temperatures on 0.25 x 0.25 degree grids (78-098A-08Z)


78-098A-08W SMMR TCT Radiances
------------------------------
This calibrated radiometric data set was generated from the Antenna
Temperature Tape (TAT; original NSSDC ID 78-098A-08A) and was produced by an
IBM 3081 computer onto 9-track, 6250-bpi, binary magnetic tapes. Each
tape contains 3 days of brightness temperatures in the TAT resolution.
There are also data on the incidence and reflected sun-boresight
angles, and geographic and quality flags. The radiances contained in
this data set were calibrated based on a model computation;
consequently, they differ from those of the CELL-ALL data (original NSSDC ID
78-098A-08B), which were derived from prelaunch test data.
Conversions from the CELL to the TCT radiances are possible by means
of a linear equation.


78-098A-08Y SMMR TCT Half-Degree Brightness Temperatures
--------------------------------------------------------
This set of calibrated global brightness temperature maps was produced
by an IBM 3081 computer onto 9-track, 6250-bpi, binary magnetic tapes.
It was generated from the Calibrated Temperature Tape (TCT; original NSSDC ID
78-098A-08W), and each map covers a 6-day period, i.e., 3 days of
data. Daytime and nighttime calibrated horizontal and vertical
polarization brightness temperatures from 5 bands (37, 21, 18, 10, and
6.6 GHz) are mapped onto grids of 1/2-deg latitude by 1/2-deg
longitude (55 x 55 km at the equator). The maps range from 85 deg N.
to 85 deg S. and from 180 deg W. to 180 deg E. There is approximately
one tape per month.


78-098A-08Z SMMR TCT Quarter-Degree Brightness Temperatures
-----------------------------------------------------------
This set of calibrated global brightness temperature maps was produced
by an IBM 3081 computer onto 9-track, 6250-bpi, binary magnetic tapes.
It was generated from the Calibrated Temperature Tape (TCT; original NSSDC ID
78-098A-08W), and each map covers a 6-day period, i.e., 3 days of
data. Daytime and nighttime calibrated horizontal and vertical
polarization brightness temperatures from 5 bands measured at 37 GHz
are mapped onto grids of 1/4-deg latitude by 1/4-deg longitude (27.5 x
27.5 km). The maps range from 85 deg N. to 85 deg S. and from 180 deg
W. to 180 deg E. There is approximately one tape per 3 mo.

Geographic Coverage Spatial coordinates   

N: 85.0

S: -85.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Creator: MAJOR, G Dataset Title: Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) Calibrated Temperature Data (TCT) at NSIDC Online Resource: http://nsidc.org/daac/

Temporal Coverage

Start Date: 1978-10-25 Stop Date: 1987-08-20

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Science Keywords

SPECTRAL/ENGINEERING > MICROWAVE > BRIGHTNESS TEMPERATURE

ISO Topic Category

IMAGERY/BASE MAPS/EARTH COVER

Platform

NIMBUS-7

Instrument

RADIOMETERS SMMR > Scanning Multichannel Microwave Radiometer

Project

ESIP > Earth Science Information Partners Program EOSDIS > Earth Observing System Data Information System

Ancillary Keywords

78-098A-08W 78-098A-08Y 78-098A-08Z IDN_NODE GSFC/NSIDC MICROWAVE REMOTE SENSING NSIDC TCT EOSDIS

Originating Center

NSSDC

Data Center

NSIDC Distributed Active Archive Center Data Center URL: http://nsidc.org/daac/ Data Center Personnel Name: NSIDC DAAC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA National Snow and Ice Data Center Data Center URL: http://nsidc.org Data Center Personnel Name: NSIDC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA

Personnel

PER GLOERSEN Role: INVESTIGATOR Role: TECHNICAL CONTACT Phone: (301) 614-5710 Fax: (301) 614-5644 Email: Per.Gloersen at nasa.gov Contact Address: Laboratory for Hydrospheric Processes NASA/Goddard Space Flight Center Code 614 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA PAUL HWANG Role: INVESTIGATOR Phone: 301-286-2233 Contact Address: Code 430 NASA/Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA GENE R. MAJOR Role: DIF AUTHOR Email: gsfc-gcmduso at mail.nasa.gov

Publications/References

Gloersen, P., D.J. Cavalieri, A.T.C. Chang, T.T. Wilheit,
W.J. Campbell, O.M. Johannessen, K.B. Katsaros, K.F. Kunzi, D.B. Ross,
D. Staelin, E.P.L. Windsor, F.T. Barth, P. Gudmandsen, E. Langham and
R.O. Ramseier. 1984. "A summary of results from the frist NIMBUS-7
SMMR observations", J. Geophys. Res., Vol. 89, pp. 5335-5344.

Gloersen, P., and L. Hardis. 1979. "The Scanning Multichannel
Microwave Radiometer (SMMR) Experiment", Nimbus-7 User's Guide, ed. by
C.R. Madrid, NASA/Goddard Space Flight Center, Greenbelt, Maryland,
pp. 213-245.

Creation and Review Dates

Last DIF Revision Date: 2009-01-08

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