[RegCNET] Which time step to use in monthly file after postprocessing in RegCM4.2

[Kanha Pattnayak]

Dear All

I am using CDO for calculating daily and monthly files for RegCM4.2 outputs
i.e. ATM, RAD and SRF files.
After the postprocessing, the monthly files suppose to be of *1 time
step*but the .ctl files shows
*2 time step *and both the time steps shows different values.
I am totally confuse which time step to use whether 1st or 2nd. Please
suggest me what to do.

I am using the following command for monthly average

cdo monavg India_ATM.2002010100_pressure.nc India_ATM.200207.nc

The following is the corresponding .ctl file

dset ^India_ATM.200207.nc
dtype netcdf
undef -1e+34_FillValue
title ICTP Regional Climatic model V4 ATM output
pdef  118  99 bilin sequential binary-big ^India.coord
xdef   258 linear   49.47   0.24
ydef   197 linear   -5.11   0.24
zdef   11 levels  1000.0  925.0  850.0  700.0  500.0  400.0  300.0  250.0
 200.0  150.0  100.0
tdef        2 linear 18Z31jul2002    6hr
vectorpairs u,v s01u10m,s01v10m
vars   14
xlon=>xlon 0 y,x Longitude at cross points (degrees_east)
xlat=>xlat 0 y,x Latitude at cross points (degrees_north)
topo=>topo 0 y,x Domain surface elevation (m)
mask=>mask 0 y,x Domain land/ocean mask (1)
ps=>ps 0 t,y,x Surface pressure (hPa)
u=>u   11 t,z,y,x U component (westerly) of wind (m s-1)
v=>v   11 t,z,y,x V component (southerly) of wind (m s-1)
omega=>omega   11 t,z,y,x Pressure velocity (hPa s-1)
t=>t   11 t,z,y,x Temperature (K)
qv=>qv   11 t,z,y,x Water vapor mixing ratio (kg kg-1)
qc=>qc   11 t,z,y,x Cloud water mixing ratio (kg kg-1)
tpr=>tpr 0 t,y,x Total daily precipitation rate (kg m-2 day-1)
tgb=>tgb 0 t,y,x Lower groud temperature (K)
swt=>swt 0 t,y,x Total soil water (kg m-2)
endvars


Thanks in advance


-- 
Kanhu Charan Pattnayak (Research Scholar)
Room No.331, Block - VI
Centre for Atmospheric Sciences
IIT Delhi, Hauz Khas
New Delhi - 110 016
India
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