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  • Other Sources  (23)
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  • 11
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    Development, implementation and evaluation of satellite-aided agricultural monitoring systems (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Research supporting the use of remote sensing for inventory and assessment of agricultural commodities is summarized. Three task areas are described: (1) corn and soybean crop spectral/temporal signature characterization; (2) efficient area estimation technology development; and (3) advanced satellite and sensor system definition. Studies include an assessment of alternative green measures from MSS variables; the evaluation of alternative methods for identifying, labeling or classification targets in an automobile procedural context; a comparison of MSS, the advanced very high resolution radiometer and the coastal zone color scanner, as well as a critical assessment of thematic mapper dimensionally and spectral structure.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10405 , NASA-CR-171679 , IT-E2-04377 , NAS 1.26:171679 , ERIM-160300-35-F
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    Characterization and Comparison of LANDSAT-4 and LANDSAT-5 Thematic Mapper Data (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-08-14
    Description: Engineering analyses of Thematic Mapper (TM) image data have been conducted, giving particular attention to the radiometric characterization of the sensor. While the data in general were found to be excellent, anomalies do exist in the data from both LANDSAT-4 and LANDSAT-5 TM. A summary is provided of the LANDSAT-5 TM image data. Recent analyses of LANDSAT-5 TM data and comparisons of the radiometry of the two sensors are emphasized. One of the specific topics covered is within-line droop, a phenomenon whereby the signal levels of the sensor change systematically during the active scan. Attention is also given to scan-correlated level shifts, an effect which raises or lowers the signal level of all pixels in a scan line or set of scan lines. A comparison of LANDSAT-4 and LANDSAT-5 radiometric corrections is also discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Study on Spectral(Radiometric Characteristics of the Thematic Mapper for Land Use Applications; p 21-37
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    Study of Spectral/Radiometric Characteristics of the Thematic Mapper for Land Use Applications (1985)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An investigation conducted in support of the LANDSAT 4/5 Image Data Quality Analysis (LIDQA) Program is discussed. Results of engineering analyses of radiometric, spatial, spectral, and geometric properties of the Thematic Mapper systems are summarized; major emphasis is placed on the radiometric analysis. Details of the analyses are presented in appendices, which contain three of the eight technical papers produced during this investigation; these three, together, describe the major activities and results of the investigation.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E86-10025 , NASA-CR-176269 , NAS 1.26:176269 , ERIM-164000-19-F
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    NASA TECHNICAL REPORTS
  • 14
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    Study on spectral/radiometric characteristics of the Thematic Mapper for land use applications (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Progress under the LANDSAT-4 and 5 Image Data Quality Assessment program for the Thematic Mapper is described. An initial screening of LANDSAT-5 data is performed. Tools are developed to allow access to TIPS-format data. Analysis of scan direction related signal droop is resumed with detailed analysis of nighttime data. A new mathematical model is developed to describe the effect. Coherent noise of a lower frequency than previously reported is discovered and analyzed. Coincident LANDSAT-4 TM and MSS data are analyzed to improve understanding of radiometric relationships between similar wavebands in the two sensors.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E85-10021 , NASA-CR-174044 , NAS 1.26:174044 , ERIM-164000-11-P , QSTPR-7
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    NASA TECHNICAL REPORTS
  • 15
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    Assessment of technologies for classification of mixed pixels (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A new method of directly classifying mixed pixels is described. This method and four frequently used indirect mixed pixel classification techniques are evaluated on Landsat MSS data from the U.S. Corn Belt using an automatic corn and soybean labeling technique. The results indicate that while more sophisticated, physically-based techniques for classsifying mixed pixels may yield a higher Percent Correct Classification (PCC) for those pixels, the net effect on a crop area proportion estimation procedure may be negative.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: International Symposium on Remote Sensing of Environment; May 09, 1983 - May 13, 1983; Ann Arbor, MI
    Format: text
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    NASA TECHNICAL REPORTS
  • 16
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    Study of spectral/radiometric characteristics of the Thematic Mapper for land use applications (1985)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Progress during ERIM's tenth quarter of effort under the LANDSAT-4 and 5 Image Data Quality Assessment program for the Thematic Mapper is described. Coincident LANDSAT-4 and 5 fully corrected (CCT-PT) TM data are analyzed in more detail and revised band-by-band relationships between the two sensors derived. An analysis technique employing the matching of cumulative distributions is developed and used and is believed to offer advantages over the histogram matching procedure currently used to produce LANDSAT data. Multiplicative factors ranging from 0.987 to 1.145 and offsets ranging from -2.7 to -6.2 video quantum levels are required to cause LANDSAT-5 data to match LANDSAT-4 data values. Evidence of low level clipping is found in TM Bands 5 and 7 of LANDSAT-5 but not LANDSAT-4. Analysis of the information content of LANDSAT TM and MSS data is continued. Components of information loss are identified and quantified and the effects of coarsened quantization are explored.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E85-10106 , NASA-CR-175317 , NAS 1.26:175317 , ERIM-164000-18-P
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    NASA TECHNICAL REPORTS
  • 17
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    Understanding and utilization of Thematic Mapper and other remotely sensed data for vegetation monitoring (1983)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The TM Tasseled Cap transformation, which provides both a 50% reduction in data volume with little or no loss of important information and spectral features with direct physical association, is presented and discussed. Using both simulated and actual TM data, some important characteristics of vegetation and soils in this feature space are described, as are the effects of solar elevation angle and atmospheric haze. A preliminary spectral haze diagnostic feature, based on only simulated data, is also examined. The characteristics of the TM thermal band are discussed, as is a demonstration of the use of TM data in energy balance studies. Some characteristics of AVHRR data are described, as are the sensitivities to scene content of several LANDSAT-MSS preprocessing techniques.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E84-10150 , NASA-CR-171781 , NAS 1.26:171781 , ERIM-160300-76-F
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 18
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    Study of spectral/radiometric characteristics of the thematic mapper for land use applications (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The previous characterization of scan-related low-frequency noise was confirmed and extended through analysis of reflective-band data from another nighttime acquisition. Amplitude and phase relationships of the level shifts were determined for each detector in each of free full frames. Analysis of scan-direction-related signal droop effects in nighttime data from the reflective bands was begun with encouraging initial observations. Also, an effort to characterize high-frequency noise in the reflective bands through Fourier analysis of nighttime data was initiated. Recommendations are made relative to the choice of radiometric calibration constants in the thematic mapper image processing system for the routine processing of TM data. Non-linear (piece-wise linear) calibration curves are recommended.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E84-10058 , NASA-CR-173218 , NAS 1.26:173218 , ERIM-164000-8-P , QSTPR-5
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    NASA TECHNICAL REPORTS
  • 19
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    Study on spectral/radiometric characteristics of the Thematic Mapper for land use applications (1983)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Previous characterization of scan-related low-frequency noise was extended and refined through detailed analysis of shutter calibration data on CCT-ADDS tapes and reflective-band data from nighttime acquisitions. A recommended correction procedure was identified that uses calibration shutter data both as a diagnostic and to obtain correction values. Through comparison of coincident TM and MSS data, illustrations of the added information content of TM data for agricultural applications were developed. The capability of improved spatial resolution to better define boundaries and to resolve spatial details is shown. Spectral analysis of tasseled-cap transformations of TM and MSS data shows high correlation between greenness features, greater signal range for TM, and indications that a subset of TM bands could accurately simulate MSS data, if required.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10409 , NASA-CR-174539 , NAS 1.26:174539 , ERIM-164000-4-T , QSTPR-4
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  • 20
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    Study on spectral/radiometric characteristics of the thematic mapper for land use applications (1983)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The change in mean signal level as a function of scan angle and scan direction was studied. The overall scan angle effect corresponded to that expected based on atmospheric modeling and scene characteristics. An initial, empirical correction model employing exponential decay was developed for reflective bands. Band 6 has a significant scan direction effect which is markedly different from that found in the reflective bands. A low frequency noise was discovered which was most pronounced in Band 1, detectors 4, 12, 10, and 8, having amplitudes of approximately 2.0, 1.5, 1.0, and 0.75 quantizing levels, respectively. This low frequency variation in mean signal amplitude was highly correlated among these four Band 1 detectors. Low frequency noise was also observed in Band 7, detector 7; band 2, detector 1; Band 3, detectors 1 and 16; and Band 5, detector 10.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10348 , NASA-CR-172673 , NAS 1.26:172673 , ERIM-164000-2-T , QSTPR-2
    Format: application/pdf
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