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This Web page provides examples of how to use the following IDL routines for the TOVS Path-P data set:
At the IDL prompt, navigate to the directory that contains the data using the following command:
IDL> cd,"/usr/me/TOVS/"
Call ppp_toc using the following command:
IDL> ppp_toc,sds_desc,dates
You should see output similar to the following:
% PPP_TOC: Searching for data files. This may take a moment...
======================> TOVS Data set Table of Contents <======================
DATASET_DIRECTORY :.//
NUMBER OF DAILY FILES FOUND : 10
BEGINNING_DATE (YYYYDOY) :1979193
ENDING_DATE (YYYYDOY) :1990009
% COMPILED MODULE: JULDAY.
THERE ARE MISSING DATES IN THIS SET OF FILES.
THE FOLLOWING 27 PARAMETERS ARE AVAILABLE IN EACH DAILY DATA FILE:
TEMP-50 TEMP-70 TEMP-100
TEMP-300 TEMP-400 TEMP-500
TEMP-600 TEMP-700 TEMP-850
TEMP-900 WVAPOR-300 WVAPOR-400
WVAPOR-500 WVAPOR-700 WVAPOR-850
SKTEMP HIRS_CLDY FCLD
CLPRESS CLTEMP EMISS
ISICE SOLZEN PRESS
PBLSTRAT CG ALPHA
THE ANCILLARY FILE IS :TPP_N100_9999999_ANCIL.HDF
THE FOLLOWING 4 ANCILLARY PARAMETERS ARE AVAILABLE:
LATITUDE LONGITUDE LANDMASK
ELEVATION
Try running PPP_STATS for the TOVS Path-P SDS called TEMP-50 for the first week of January 1990 using the following command:
IDL> ppp_stats,'temp-50',start_date=1990001,end_date=1990007
An alternative is to make up your own dates array using the following command:
IDL> ppp_stats,'temp-50',dates=1990001+indgen(7)
You can also subset the dates array returned from PPP_TOC in the previous example by using the following command:
IDL> ppp_stats, 'temp-50', dates=dates[0:6]
After using any of the above commands, you should see output that looks similar to the following:
==========================================================
===================Summary Statistics=====================
% Compiled module: STR_SEP.
SDS Name: TEMP-50
SDS Label: TEMP: temperatures [K] at pressure level 50
SDS Unit: K
SDS Fill Value: -99999
----------------------------------------------------------
yyyydoy Minimum Maximum Average Standard %Used
Deviation
==========================================================
% Compiled module: MOMENT.
1990001 195.70 222.54 207.10 5.72 65.45
1990002 194.83 223.67 207.08 6.08 66.41
1990003 195.29 226.67 206.87 6.50 65.03
1990004 197.34 227.05 206.91 6.33 66.27
1990005 197.01 226.28 207.19 6.13 64.56
1990006 196.80 226.28 207.49 6.41 64.54
1990007 197.08 225.64 207.45 6.42 65.18
----------------------------------------------------------
194.83 227.05 207.15 6.23 65.35
==========================================================
