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  • 1
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    A statistical examination of Nimbus-7 SMMR data and remote sensing of sea surface temperature, liquid water content in the atmosphere and surface wind speed (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Nimbus 7 Scanning Multichannel Microwave Radiometer (SMMR) brightness temperature measurements over the global oceans have been examined with the help of statistical and empirical techniques. Such analyses show that zonal averages of brightness temperature measured by SMMR over the oceans on a large scale are primarily influenced by the water vapor in the atmosphere. Liquid water in the clouds and rain, which has a much smaller spatial and temporal scale, contributes substantially to the variability of the SMMR measurements within the latitudinal zones. The surface wind not only increases the surface emissivity, but through its interactions with the atmosphere produces correlations in the SMMR brightness temperature data that have significant meteorological implications. It is found that a simple meteorological model can explain the general characteristics of the SMMR data. With the help of this model, methods to infer over the global oceans, the surface temperature, liquid water content in the atmosphere, and surface wind speed are developed. Monthly mean estimates of the sea surface temperature and surface winds are compared with the ship measurements. Estimates of liquid water content in the atmosphere are consistent with earlier satellite measurements. Previously announced in STAR as N83-19187
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Climate and Applied Meteorology (ISSN 0733-3021); 22; 2023-203
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Climatological aspects of Nimbus-7 SMMR data (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: An algorithm was developed for calculating simultaneously SSTs, SWs, and TAUs on a global basis using only the 6.6 and 18 GHz channels of the SMMR. Samples of the retrievals were calculated in each of eight of the SMMR years and found to produce independent results, consistent with weather charts and climatic records, even in the presence of high winds. Another new algorithm for calculating high-latitude scalar winds from Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) data was devised and tuned with surface observations from a number of documented Arctic Polar Low events. The algorithm utilizes the horizontally and vertically polarized radiances from the 0.8 and 1.7 cm wavelength channels of the ten-channel SMMR to retrieve near surface oceanic scalar winds and cloud water in the column, and takes advantage of the relatively small fluctuations in atmospheric water vapor at high latitudes. An advantage of this algorithm for high latitude winds from SMMR over the global algorithm is an inherently better spatial resolution as a result of the shorter wavelengths used.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Laboratory for Oceans; p 143-145
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Observation of El Nino by the Nimbus-7 SMMR (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The quality of Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) derived SST, water vapor, and windspeed are assessed, and these parameters are used to study the El Nino event of 1982-1983 in the equatorial Pacific region from 120 deg to the South American coast. The features of the anomaly fields for these parameters, and the connections between these fields, are discussed. Anomaly fields are found to be qualitatively consistent with outgoing longwave radiation anomaly fields and wind vector anomaly fields.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Format: text
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  • 4
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    Antarctic Sea Ice variations 1973 - 1975 (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Variations in the extent and concentration of sea ice cover on the Southern Ocean are described for the three-year period 1973-75 using information derived from the Nimbus-5 passive microwave imager.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 4th NASA Weather and Climate Program Sci. Rev.; p 335-340
    Format: application/pdf
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  • 5
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    User's guide for the Nimbus 7 Scanning Multichannel Microwave Radiometer (SMMR) CELL-ALL tape (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The SMMR instrument onboard the Nimbus-7 satellite has been in operation since October 1978. It provided global coverage of passive microwave observations at 6.6, 10.7, 18, 21, and 37 GHz. The oberved brightness temperature can be used to retrieve geophysical parameters, principally sea surface temperature, atmospheric water vapor and liquid water content over oceans, sea ice concentration, and snow cover over land. The SMME CELL-ALL Tape contains earth-located calibrated brightness temperature data which have been appropriately binned into cells of various grid sizes, allowing intercomparisons of observations made at different frequencies (with corresponding different footprint sizes). This user's guide describes the operation of the instrument, the flow of the data processing the calibration procedure, and the characteristics of the calibrated brightness temperatures and how they are binned. Detailed tape specifications and lists of available data are also provided.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-RP-1210 , REPT-88-181 , NAS 1.61:1210
    Format: application/pdf
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  • 6
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    Global maps of atmospheric water vapor, cloud water, and rainfall derived from Nimbus-7 scanning multichannel microwave radiometer data A case study (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Oceanography from space; May 26, 1980 - May 30, 1980; Venice; Italy
    Format: text
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