SEASONAL VEGETATION DIFFERENCES FROM ERTS IMAGERY

Knowledge of the times when crop and forest vegetation experience seasonally related changes in development is important in understanding growth and yield relationships. This article describes how densitometry of Earth Resources Technology Satellite (ERTS-1) multispectral scanner (MSS) imagery can be used to identify such phenological events. Adjustments for instrument calibration, aperture size, gray-scale differences between overpasses, and normalization of changing solar elevation are considered in detail. Seasonal vegetation differences can be identified by densitometry of band 5 (0.6-0.7 micrometers) and band 7(0.8-1.1 micrometers) MSS imagery. Band-to-band ratios of the densities depicted the changes more graphically than the individual band readings.

• Corporate Authors:

  American Society of Photogrammetry

  105 North Virginia Avenue
  Falls Church, VA  United States  22046
• Authors:
  • Ashley, M D
  • Rea, J
• Publication Date: 1975-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 713-719
• Serial:
  • American Society of Photogrammetry, Journal of
  • Volume: 41
  • Issue Number: 6
  • Publisher: American Society of Photogrammetry

Subject/Index Terms

• TRT Terms: Artificial satellites; Crops; Densitometers; Imagery; Natural resources; Seasons; Vegetation
• Uncontrolled Terms: Multispectral imagery; Seasonal variations
• Old TRIS Terms: Satellite program
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00098438
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1975 12:00AM