The Matlab script, 'callGetNldasForcing.m' will call the function, 'getNldasForcing.m,' which downloads NLDAS primary forcings (A) at any number of point locations and saves them as individual text files that contain the corresponding meteorological timeseries. If a requested location is not in the NLDAS domain, the script will issue a warning and download the closest NLDAS pixel to the requested location.
Use 'inFile_test.txt' to select site locations to save.
You must first install nctoolbox. Follow the instructions on that page to install.
Matlab R2008a+. You can verify the version of Matlab by typing:
version
Register with URS and create a file titled .netrc in your home directory. Place the following in that file: (for details see Procedure 2 on the GES DISC help page)
machine urs.earthdata.nasa.gov login <uid> password <password>
Java version 7 or higher. You can verify the version of Java used by Matlab by typing:
version('-java')
The version returned should start with 'Java 1.7.' If it doesn't, you can try updating the Matlab JVM: http://www.mathworks.com/support/solutions/en/data/1-1812J/
The script, 'callGetNldasForcing.m' will
- Read the site name, latitude, and longitude of two arbitrary locations found in the input file, 'inFile.txt.'
- Define the range of dates over which to download. This is initially set to only 2 days for testing, which should take about a minute to run.
- Place output in a directory it creates called 'nldasForcings.' Each location's forcing data will be in a tab-delimited .txt file named after the site name. Details about the site's location are provided in a header in each file.
The above options can be changed in the 'callGetNldasForcing.m' script.
Using a CU internet connection and a 2015 Macbook Pro, it takes about 4 hours to download one year of forcing data.
If you have any questions or edits, please contact me or create a new pull request.