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I am looking for a free Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image that will let me to perform NDVI for the pilot crop health/soil moisture that can go as far back ten years or so.

It needs to have:

  • 15 m (meters)
  • temporal
  • Ten years back or so
  • Perform NDVI

This will be in a small area somewhere near Albuquerque, NM.

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Thank you everyone for the information. My question here is do I need to download for each ASTER for each year go back 10 ? I have bee looking at these websites and looks like they have similiar ASTER but not sure of the dates or years ? HELP !!! – PROBERT Sep 21 '13 at 14:04
up vote 5 down vote accepted

You can easily download freely available ASTER Level 1B (at-sensor calbirated radiances) from the USGS EarthExplorer site. A simple quick search for a polygon roughly covering New Mexico returns > 100 results, but individual scenes are much smaller, so for a full cover of the state you'd have to stitch them together. USGS Glovis should have the same data, though an older interface.

USGS EarthExplorer screenshot

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The NASA Reverb site (✓&spatial_map=satellite&spatial_type=rectangle) lists ASTER data for download.

enter image description here

You can take a look there for your specific study site and time.

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You can download ASTER image from the following websites

  1. USGS Global Visualization Viewer (GLOVIS)
  2. USGS Earth Explorer
  3. University of Maryland Global Land Cover Facility (GLCF)
  4. NASA Echo-Reverb
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