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  • GEOPHYSICS  (3)
  • Meteorology and Climatology  (1)
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  • 1
    Publication Date: 2019-06-28
    Description: The programs described were developed to process GEODYN-formatted satellite altimeter data, and to apply the processed results to predict geoid undulations and gravity anomalies of inland sea areas. These programs are written in standard FORTRAN 77 and are designed to run on the NSESCC IBM 3081(MVS) computer. Because of the experimental nature of these programs they are tailored to the geographical area analyzed. The attached program listings are customized for processing the altimeter data over the Black Sea. Users interested in the Caspian Sea data are expected to modify each program, although the required modifications are generally minor. Program control parameters are defined in the programs via PARAMETER statements and/or DATA statements. Other auxiliary parameters, such as labels, are hard-wired into the programs. Large data files are read in or written out through different input or output units. The program listings of these programs are accompanied by sample IBM job control language (JCL) images. Familiarity with IBM JCL and the TEMPLATE graphic package is assumed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-100730 , REPT-89B00106 , NAS 1.15:100730
    Format: application/pdf
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  • 2
    Publication Date: 2019-06-28
    Description: Satellite-based altimetric data taken by GEOS-3 and SEASAT over the Black Sea and Caspian Sea are analyzed and a least squares collocation technique is used to predict the geoid undulation on a .25-degree by .25-degree grid and to transform these geoid undulations to free air gravity anomalies. This project entailed processing satellite altimeter data over inland seas for recovery of area mean gravity information. Gravity information in this area of the world is not readily available, so the possibility of obtaining it from the processing of altimeter observations is attractive. The principal objective was to complete and extend analyses done in a previous study, verify those results, and document the results and techniques. A secondary objective was to improve the algorithms and results, if possible. The approach used involved editing geoid height data to remove overland data; evaluating geoid height differences at crossover points; removing orbit errors from geoid heights using crossover differences; gridding geoid height data at .25-degree by .25-degree intervals; and estimating the gravity anomalies from gridded geoid heights using the collocation technique.
    Keywords: GEOPHYSICS
    Type: NASA-TM-100729 , NAS 1.15:100729 , REPT-89B00107
    Format: application/pdf
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  • 3
    Publication Date: 2019-06-27
    Description: Attempted rocket-borne radiometer observations of molecular oxygen nighttime emission in near infrared at zero deg latitude
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-65670 , X-622-70-430
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-11
    Description: Ideally, the Crop Country Inventory, CCI, is a methodology for the pre-harvest prediction of large variations in a country s crop production. This is accomplished by monitoring the historical climatic fluctuations, especially during the crop calendar period, in a climate sensitive large crop production region or sub-country, rather than the entire country. The argument can be made that the climatic fluctuations in the climatic sensitive region are responsible for the major annual crop country variations and that the remainder of the country, without major climatic fluctuations for a given year, can be assumed to be a steady-state crop producer. The principal data set that has been used is the Global Climate Mode (GCM) data from the National Center for Environmental Prediction (NCEP), taken over the last half century. As a test of its accuracy, GCM data can and has been correlated with the actual meteorological station data at the station site.
    Keywords: Meteorology and Climatology
    Type: NASA/TM-2004-212252/VOL1 , Rept- 2005-00563-0/VOL1
    Format: application/pdf
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