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  • 1970-1974  (7)
  • 1
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    Color and color-IR films for soil identification (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Color and color IR films for soil identification, performing optical density measurements on film transparencies with densitometer
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 2
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    Discriminant analyses of Bendix scanner data (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Flights over Weslaco, Texas are discussed, using the 9-channel Bendix scanner, providing calibrated data in the 380 to 1000 nm wavelength interval. These flights were at 2000 ft. These data gave seasonal coverage from the time signals, representing mainly the soil background. The ground truth data are provided; signature processing studies relating scanner data to ground truth were also carried out.
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center 4th Ann. Earth Resources Program Review, Vol. 5; 22 p
    Format: application/pdf
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  • 3
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    Vegetation density as deduced from ERTS-1 MSS response (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Reflectance from vegetation increases with increasing vegetation density in the 0.75- to 1.35 micron wavelength interval. Therefore, ERTS-1 bands 6 (0.7 to 0.8 micron) and 7 (0.8 to 1.1 micron) contain information that should relate to the probable yield of crops and the animal carrying capacity of rangeland. The results of an experiment designed specifically to test the relations among leaf area index (LAI), plant population, plant cover and plant height, and the ERTS-1 MSS responses for 3 corn, 10 sorghum, and 10 cotton fields are given. Plant population was as useful as LAI for characterizing the sorghum and corn fields, and plant height was as good as LAI for characterizing cotton fields. These findings generally support the utility of ERTS-1 data for explaining variability in green biomass, harvestable forage and other indicators of productivity.
    Keywords: GEOPHYSICS
    Type: PAPER-A6 , NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. A; p 93-116
    Format: application/pdf
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  • 4
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    Reflectance of vegetation, soil, and water (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Bands 4, 5, and 7 and 5, 6, and 7 were best for distinguishing among crop and soil categories in ERTS-1 SCENES 1182-16322 (1-21-73) and 1308-16323 (5-21-73) respectively. Chlorotic sorghum areas 2.8 acres or larger in size were identified on a computer printout of band 5 data. Reflectance of crop residues was more often different from bare soil in band 4 than in bands 5, 6, and 7. Simultaneously acquired aircraft and spacecraft MSS data indicated that spacecraft surveys are as reliable as aircraft surveys. ERTS-1 data were successfully used to estimate acreage of citrus, cotton, and sorghum as well as idle crop land.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10235 , NASA-CR-142423
    Format: application/pdf
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  • 5
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    Reflectance of vegetation, soil, and water (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Iron deficient and normal grain sorghum plants were sufficiently different spectrally in ERTS-1 band 5 CCT data to detect chlorotic sorghum areas 2.8 acres (1.1 hectares) or larger in size in computer printouts of the MSS data. The ratio of band 5 to band 7 or band 7 minus band 5 relates to vegetation ground cover conditions and helps to select training samples representative of differing vegetation maturity or vigor classes and to estimate ground cover or green vegetation density in the absence of ground information. The four plant parameters; leaf area index, plant population, plant cover, and plant height explained 87 to 93% of the variability in band 6 digital counts and from 59 to 90% of the variation in bands 4 and 5. A ground area 2244 acres in size was classified on a pixel by pixel basis using simultaneously acquired aircraft support and ERTS-1 data. Overall recognition for vegetables, immature crops and mixed shrubs, and bare soil categories was 64.5% for aircraft and 59.6% for spacecraft data, respectively. Overall recognition results on a per field basis were 61.8% for aircraft and 62.8% for ERTS-1 data.
    Keywords: GEOPHYSICS
    Type: E74-10265 , NASA-CR-136651
    Format: application/pdf
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  • 6
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    Plant size, etc., and aerial films (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Chlorophyll concentration of chlorotic leaves, expressed as milligrams of chlorophyll per cubic centimeter of leaf volume, was positively correlated to film density readings. Images on the film became darker as chlorophyll concentration increased. Plant size was not related to density readings.
    Keywords: GEOPHYSICS
    Type: Photogrammetric Engineering; 40; Jan. 197
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  • 7
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    Multibase and multiemulsion space photos for crops and soils (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Crop species and soil condition computerized identification from film optical density differences, using multibase and multiemulsion photography
    Keywords: GEOPHYSICS
    Type: ; BROTECHNIKA, NO. 1(
    Format: text
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