Dear Mohammad
there are many software(s) [*] around but most of them were developed in an institutional context, and they are probably not freely available. Also remember, as I mentioned above, that most WSIs computed by FEWS or JRC or others are actually "customizations", i.e. there is no longer only one standard WSI. Therefore, if you manage to put your hands on a software, make sure you also have a description of the algorithm that was implemented. Also, WSI is now usually computed on a grid, based on gridded inputs with resulting grid output. Look up this sites for two US implementations at IRI and FEWS:
http://iridl.ldeo.columbia.edu/document ... readme.pdf and
http://chg.geog.ucsb.edu/tools/geowrsi/index.html. For a European counterpart, try
http://www.gsdidocs.org/gsdiconf/GSDI-9 ... 1paper.pdf at JRC. The JRC GWSI software For an example from Wageningen Agricultural University, look up
https://www.researchgate.net/publicatio ... te_sensing. If you search the net for GWSI & JRC, you'll find more documents.
At FAO, you will find AgroMetShell (AMS), which implements the WSI on a station or grid basis. Unfortunately, the software is a bit old, but still perfectly functional! It is, as far as I know, one of the few software(s) that is (are) actually available to the public. It has been used in a number of national and international studies, publications, theses etc. A detailed manual is available.
http://www.fao.org/fileadmin/user_uploa ... Armeia.pdfhttp://www.fao.org/nr/climpag/aw_6_en.aspA lot of information and downloads are available from
http://www.hoefsloot.com/agrometshell.htmI have written a simple "bare bones" programme of the WSI for incorporation into a bigger exercise called MOSAICC (see
http://edepot.wur.nl/218153). The programme is called "WB" and comes in three "flavours" WB1, WB2 and WB3 that differ by the way data are passed to it. The programme is available for windows and linux.
Here's my suggestion: drop a line to FEWS (e.g. Tamuka, who started this discussion) and to JRC, ans see if they have anything usable (i.e. non-web based) they can share. Also try AMS. If desperate, I can share WB1, WB2 and WB3 with you.
Best regards!
R
[*] "Software" is supposed to be singular, but then how should one say "many software(s)". Maybe the right way would be to say "there is much software around."