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How to Download, process and apply ASCAT data. ArcCatalog/ArcMap v.10

1. Run the wget script in Cygwin in order to download the latest set of information. This will place the downloaded files into a folder for further processing.
2. In ArcCatalog create a folder connection for these files.
3. View the folder in the Catalog, and use the merge tool for each day of shapefiles in the folder. This will make the data easier to project onto a geographic coordinate system, as well as easier to load as a layer in ArcMap. (Arc Toolbox> Data Management Tools> General> Merge.)
4. Use the define projection tool to define the projection as WGS 1984. (Arc Toolbox> Data Management Tools> Projections and Transformations> Define Projection)
5. Open ArcMap, and add the data from the merged shapefile set, as well as a 1984 WGS topographic map.
6. Open the attribute table of the shapefile merge and choose ‘select by attribute’
7. In order to narrow down the scope of the data, geographically, input a query by latitude and longitude. 

Copy and Paste

“LON”>-96 and “LON”<-82 and “LAT”>18 and“LAT”<30


1.       Export the data as a new layer, saved in the file where the ASCAT data files are, and named as something that is easily found, such as DDMMYYYYGoM

2.       This data can further be processed by changing the symbology associated with the shapefiles. Double Click the layer in the table of contents, and go to the symbology tab. Click the symbol button>Style references> check weather. Use a simple weather arrow symbol, since we are working with relative wind data. Then go back to the symbology tab, and click advanced>rotation>set the parameters to DIR>OK>OK. Now the data makes sense.

3.       This data can be matched to the correct time frame, in order to derive information in order to get idea of oceanic wind conditions.


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