1 / 11

CHAPTER 3

FUNDAMENTALS. CHAPTER 3. Satellites, Sensors and Data Forms. A. Dermanis. SATELLITES & SENSORS. LANDSAT 7 SATELLITE. SPOT 4 SATELLITE. 2 HRVIR High Resolution Visible Infrrared 4 bands. ETM+ Enhanced Thematic Mapper 7 bands. A. Dermanis. A. Dermanis. A. Dermanis. A. Dermanis.

Download Presentation

CHAPTER 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. FUNDAMENTALS CHAPTER 3 Satellites, Sensors and Data Forms A. Dermanis

  2. SATELLITES & SENSORS LANDSAT 7 SATELLITE SPOT 4 SATELLITE 2 HRVIR High Resolution Visible Infrrared 4 bands ETM+ Enhanced Thematic Mapper 7 bands A. Dermanis

  3. A. Dermanis

  4. A. Dermanis

  5. A. Dermanis

  6. HYPERSPECTRAL SENSORS A. Dermanis

  7. Spatial Resolution: no of pixels per ground area Increases when pixels become smaller Spectral Resolution: no of bands per wavelength Overall: increases with number of bands Locally: increases when wavelength difference between successive bands becomes smaller Temporal al Resolution: no of imaging repetitions per time Increases when days between revisiting an area become fewer Radiometric Resolution: no of values for grey tone variation = 2p p = number of bits per single (integer) value Increases with number of bits p DATA RESOLUTION A. Dermanis

  8. one image for each band covering the same ground area Field Of View no of bands Instantaneous Field Of View THE DATA for each band: image = matrix of pixels with R rows & C columns pixel xij A. Dermanis

  9. BSQ: Band Sequential BIL: Band Interleaved by Pixel BIL: Band Interleaved by Line DATA FORMATS A. Dermanis

  10. DATA PRESENTATION Each band in Black & White black pixel value 1 (0 reserves as “no data” code) white  pixel value max (2p) 3 bands in a color composite red  pixel value of 1st band green  pixel value of 2nd band blue  pixel value of 3rd band 1st, 2nd, 3rd band = = any 3 bands in any order The RGB Color System A. Dermanis

  11. Landsat Thematic Mapper 7 bands Band 1 Band 2 Band 3 Band 4 Band 5 Band 7 Band 6 Color composites 321 432 742 754 574 A. Dermanis

More Related