Imagenes De Satelite

Páginas: 3 (612 palabras) Publicado: 21 de julio de 2012
Download Procedure The general EOSDG download procedure can be found at the WIST Ordering Tutorial Step 1: Visit NASA WIST and open an account according to the directions on the page. Step 2: Enteras a registered user or as a guest. Step 3: Select radio button: ASTER. Step 4: Select Data Set: ASTER L1A RECONSTRUCTED UNPROCESSED INSTRUMENT DATA V003 Step 5: Select the latitude and longitudebounding coordinates of your search area. Step 7: Set maximum granules returned = (your choice). I usually start with 5. (See comment below.) Step 8: Allow searches to run for (your choice) minutes. Try 5minutes to start. Step 9: Start the search. Step 10: If data granules are returned you must examine them. If none are returned, try increasing the search time. Just because your query did not produceresults does not necessarily mean that the data is not there. It may simply mean that the search timed out before it located your data. Don't give up until your search has run at least an hour, if thesearch utility will let youStep 11: Look at the latitude and longitude of the returned granules to see how closely they match your target area. Then look at the percent cloud cover. The higher thenumber, the greater the cloud cover. Anything greater than about 10% may be of questionable value for DEM production. If you want to you can look at the browse image from which the DEM was produced byclicking the "View Image" button. This will also give you some indication of how useful the DEM will be. Step 12: When you have decided what you want to order, check the 'Select' box next to yourselections and press the "Add to Cart" button. Then press the 'Order Options' button. From the next screen select "Option 10" AST14DEM (Relative DEM) (ASTER On-Demand L3 Digital Elevation Model, GeoTIFFormat) V003. Media Types : FtpPull, DLT, DVD Step 13: Check the desired media type. In most cases it is most expedient to check "FtpPull". This will allow you to download your order from an anonymous...
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