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Introduction

This exercise consists of running the GSI 3DVar analysis with T62 global (GFS) background field, conventional data from prepbufr, satellite radiances, and gpsro data.

Background and Data

The global background files are:

          
 surface forecast files at 3 time levels: 3, 6, 9 hours
 
           sfcf03  sfcf06  sfcf09  
          
 atmosphere forecast files at 3 time levels: 3, 6, 9 hours
           sigf03  sigf06  sigf09 
          

The observation files are:

	prepbufr   (conventional data)
	airsbufr   (gdas1.t06z.airsev.tm00.bufr_d) 
	gomebufr   (gdas1.t06z.gome.tm00.bufr_d)
	gsnd1bufr  (gdas1.t06z.goesfv.tm00.bufr_d)
	iasibufr   (gdas1.t06z.mtiasi.tm00.bufr_d)
	sbuvbufr   (gdas1.t06z.osbuv8.tm00.bufr_d)
	ssmisbufr  (gdas1.t06z.spssmi.tm00.bufr_d)
	amsuabufr  (gdas1.t06z.1bamua.tm00.bufr_d)
	gpsrobufr  (gdas1.t06z.gpsro.tm00.bufr_d)
	hirs4bufr  (gdas1.t06z.1bhrs4.tm00.bufr_d)
	mhsbufr    (gdas1.t06z.1bmhs.tm00.bufr_d)
	seviribufr (gdas1.t06z.sevcsr.tm00.bufr_d)
	tmirrbufr  (gdas1.t06z.sptrmm.tm00.bufr_d)
         

Please check the Downloading Practice Data section if need to obtain the background and observation files.