AAPP V5.3 Update Release, 31/01/2006
************************************

Contents
--------
Update 5.3 comprises a single tar file update5_3_tar.gz. The contents are as
follows:

AAPP/sources/calibration/mhscl/mhs_iwttmp.F
AAPP/sources/calibration/mhscl/mhs_updt.F
AAPP/sources/calibration/mhscl/mhssetu.F
AAPP/sources/calibration/amsubcl/amb_smpmn.F
AAPP/sources/calibration/amsubcl/amb_cal.F
AAPP/sources/calibration/avhrcl/avhcal.txt
AAPP/sources/calibration/hirscl_algoV4/h_uphrs1bcommon1_algoV4.F
AAPP/sources/preproc/atovin/amb_earthcorr.F
AAPP/sources/preproc/atovin/inmhsget.F
AAPP/sources/libs/libsatid/ordtiid.F
AAPP/sources/libs/libtle/tle_satpos.F
AAPP/sources/decommutation/decommutation/amsget.F
AAPP/sources/decommutation/decommutation/decommutation.F
AAPP/sources/decommutation/decommutation/amsout.F
AAPP/sources/decommutation/decommutation/mhsdc.F
AAPP/sources/decommutation/decommutation/mhsst.F
AAPP/config/linux.cf
  
Purpose
-------
This update 5.3 incorporates the bug fixes identified since the release of AAPP
version 5.1 on CD. The most significant ones are listed at 
http://nwpsaf.eu/web-test/deliverables/aapp/bugs.html

For completeness it includes the files already released as update 5.2

Specifically:
  - Bug fix in amb_smpmn.F (array indexing error for "sampok") 
  - Bug fix in amb_cal.F (array indexing error for "calok")
  - Bug fix in mhs_updt.F (array indexing error for "mhs_h_nonlin")
  - Prevent divide by zero error in mhs_iwttmp.F when data are missing
  - Check validity of MIU minor frame number in amsget.F
  - Remove multi-line comment in amb_earthcorr.F (not understood by some compilers)
  - split line exceeding 72 characters in amsout.F
  - AVHRR calibration parameters file formatting error for NOAA-18
  - Account for different MHS instrument identifier in NOAA/NESDIS MHS 1b data
  - Account for the fact that on some systems the Fortran intrinsic IFORT is
    signed. Affects MHS processing.
  - Set ifort compiler optimisation level to 1 in linux.cf
  - Avoid possible array overflow in ordtiid.F when HRPT data are noisy
  - Fix bug in hirscl_algoV4 which caused instrument always to be set to HIRS/4
    in HIRS level 1b
  - Correct orbit number bug (already in update 5.2)
  - Correct MHS time stamps (already in update 5.2)
  - Ignore duplicate HRPT minor frames (already in update 5.2)
  - Allow 256 character file name for HRPT file (already in update 5.2)
  
Installation
------------
To install the complete update, copy the tar file to the directory above "AAPP"
in your system (i.e. the directory containing INST_5). If you only wish to
install part of the update (e.g. if you have already customised "linux.cf"),
unpack the tar file in a temporary directory and copy the files manually to your
main AAPP directory tree.

Unpack the update using the command
  tar -xvmzf update5_3_tar.gz
or if your system does not support the -z option:
  gunzip update5_3_tar.gz
  tar -xvmf update5_3_tar

Note that the "-m" option ensures that the extracted files have the current
date, so that it should not be necessary to "clean" AAPP before re-building.

Then either re-build AAPP using INST_5 option 2 (recommended) or re-build the
individual tasks using INST_5 option 6:

  sub-option 6  - libsatid
  sub-option 13 - libtle
  sub-option 16 - decommutation
  sub-option 17 - nav_main
  sub-option 18 - avhrcl
  sub-option 23 - amsubcl
  sub-option 24 - mhscl
  
Please check your compiler output carefully to make sure there were no
unexpected errors.

The executables (in AAPP/bin) changed from version 5.1 are satpostle.exe,
decommutation.exe, amsubcl.exe and mhscl.exe. The updated avhcal.txt data file
is automatically copied to the data directory AAPP/data/calibration/coef/avhcl.