Download Software description

NWP SAF
AAPP DOCUMENTATION
SOFTWARE DESCRIPTION
Doc ID : NWPSAF-MF-UD-002
Version : 7.6
Date
: 06 May 2015
Outputs :
LEVEL 1B DATA FILES :
Files are named : hrsn.l1b msun.l1b aman.l1b ambn.l1b hrpt.l1b
Files are renamed at the end of AAPP_RUN
hirsl1b_${SATIMG}_${YYYYMMDD}_${HHMN}_${NNNNN}.l1b
msul1b_${SATIMG}_${YYYYMMDD}_${HHMN}_${NNNNN}.l1b
amsual1b_${SATIMG}_${YYYYMMDD}_${HHMN}_${NNNNN}.l1b
amsubl1b_${SATIMG}_${YYYYMMDD}_${HHMN}_${NNNNN}.l1b
hrpt_${SATIMG}_${YYYYMMDD}_${HHMN}_${NNNNN}.l1b
with
SATIMG : satellite name (example noaa16)
YYYYMMDD.: year-month-day of data
HHMN : time of data
NNNNN : orbit number
Compared to level.1a structure, 'navigation' parameters have been updated.
Located in the directory ${WRK}.
More details, see outputs of decommutation
4.2.13. Inputs/outputs HIRS calibration (first algorithm) (HIRSCL)
Inputs :
HIRS LEVEL 1A DATA FILE :
Named hrsn.l1b.
Output of the decommutation task.
Associated with logical unit 11 (see hirscl.ksh).
Located in the directory ${WRK}.
More details, see outputs of decommutation.
CALCOEF.DAT
Sequential file in ASCII text.
Contains calibration HIRS parameters.
Self-documented (lines of comments begin with "#").
One file for all the satellites (with 1 section for each).
C1 and C2 constants, used in the function of Planck are the same for all the satellites.
This file must be modified in the following cases :
• Insertion of the parameters of a new satellite (furnished just before the satellite launch).
• When the range of values are too strict and excludes too many values (that's why sometime
there is no calibration for a channel). So, modification of these values is needed. For
example, lighting conditions of the satellite change according to the season. This
phenomenon induces variations in the observed numerical counts (e.g. NOAA12 in May and
September).
Page 125 /202