Y:\ousmane\mos_iri\CFS\matlab\new\new
1. run the program newPDFbias.m which does :
	1.1 take the CFS daily prcp and put in GCM format for bias correction : Stat_G?M?.txt (in m/s units)
	1.2 Create the station data in WTD format for the bias correction too : o_stat.wtd
	1.3 create a BATCH file in order to run the correction using the program 'GCM_Bias_Corr2.exe'
2. run the program biasPDF.bat :
	2.1 does the correction using this line "GCM_Bias_Corr2 o_%s.wtd %s_G%dM%d.txt 1981 2008 121 304 0 0"  %year0 year1 year1 will be actualyear+1
	2.2 the output files of interest are two 
		. stat.pcp = GCM data not corrected ie the imput file Stat_G?M?.txt
		. c_Stat_G?M?.txt (original Stat_cd.pcp)
NOte : the program rewrite always the two files by going for eah grid box
CORRECTION :
for each grid box : its rainfall is corrected to match the PDF of each observed station in it. This is done for each runs so we get for each grid box n stations time 5 runs corrected time series. for each time serie we calculate the onset date. Then the mean onset is taken as representative of the corrected grid box onset time series which is compared with the uncorrected time series.