Period: December 20 1997 to February 28 1998
Model: NCEP/GDAS and MRF with T126L28 resolution
Machine: NASA Cray-J32 ( charney and soumi machines )

CTL: Control run which is the same as operational
EX1: RAOB denial run which excluded 14 RAOB stational reports
EX2: RAOB and ACARS denial run which is EX1 plus ACARS around 14 stations

Grid to OBS verifications

ADPUPA (time series)
Geopotential Height
Tempreature
Relative Humidity
Wind Vector