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#                                                                            #
#                               IASI OPS-LRS                                 #
#            Release Notes for version   OPS_V8.0-AAPP-l-20180118.tgz        #
#                               26 Feb 2018                                  #
#                                                                            #
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1. Package contents
-------------------
The following files are included in this release (with file sizes in bytes):

  RELEASE_NOTE_OPS-LRS_V8-0.txt           4009 This release note
  OPS_V8.0-AAPP-l-20180118.tgz        39206366 IASI OPS-LRS package

To install and run the OPS-LRS package, users need to have first installed
AAPP v8.

Most users will also require the FFTW and XERCES libraries that are available on
the AAPP ftp site, though alternatives may be suitable on some systems. See
User Manual for details.


2. Purpose
----------
OPS-LRS processes MetOp IASI data from Level 0 to Level 1c. This version
incorporates the latest OPS updates from CNES, and is based on the OPS software
used operationally at EUMETSAT.

The Level 0 data are normally obtained by direct-readout AHRPT.

This release has the following changes compared with OPS_V7-0+p12:

1) possibility to process big files (> 2GB)
2) merge code with CNES RHEL 6.5 compatibility and minor bugs fixes
3) new config file (NeDT_Threshold.cfg)
4) Bug fix for UBUNTU distribution.
5) Perl >= 5.18 compatibility
6) Updated Linux-Intel config files
 
Regarding change 6, please note that for this release, two Linux-Intel config
files are provided. Select the one that best suits your system, at the
"configure" step:
a) Linux-Intel - uses the compiler commands cc, c++ and ifort for C, C++ and
   Fortran respectively (as in previous versions of OPS-LRS)
b) Linux-Intel-icc - uses icc and ifort, i.e. uses only Intel compilers


3. Installation
---------------
a. Copy the tgz file to the directory where you want to install OPS-LRS.

b. Unpack it using the command
   tar -xvmzf OPS_V8.0-AAPP-l-20180118.tgz

   or if your system does not support the "-z" option in tar, use
   gunzip -c  OPS_V8.0-AAPP-l-20180118.tgz| tar -xmf -
   
c. Configure and build OPS-LRS following the instructions in the OPS-LRS User
   Manual.
   
d. Download the latest auxiliary files from the AAPP web site. It is recommended
   to use the script get_aux_files.sh, available at 
   https://www.nwpsaf.eu/site/software/aapp/download/. Place the files
   in an appropriate directory on your system (as specified by environment
   variable DIR_IASICONFIG).


4. License
----------
To use this software, users need have registered for AAPP version 8
with the NWP SAF (www.nwpsaf.eu), and to have agreed to the terms and
conditions for use of AAPP and OPS-LRS.


5. Delivery mechanism
---------------------
OPS-LRS is delivered via the NWPSAF web site. A test case is available also.
If you have difficulty obtaining the software please contact the NWP SAF
Helpdesk.


6. System requirements
----------------------
Linux PC is the recommended platform for OPS-LRS version 8.0. The software has
been tested with Intel and Gnu Fortran/C/C++ compilers. Previous versions of
OPS-LRS have been run on AIX and Solaris, but we do not guarantee that the
current version will work on those platforms. HPUX and IRIX are not supported.

The host machine must be able to run multithreaded applications, using pthreads
(POSIX threads).

To run OPS-LRS requires about 1 Gbyte of disk space and 2 Gbyte of memory.

Standard Unix utilities (including make, ar, tar, perl5, lex, yacc) are used.


7. AAPP Web site
----------------
For further information on AAPP and OPS-LRS, please visit the NWP SAF web site
at http://www.nwpsaf.eu

To submit bug reports, suggestions for improvement, etc., please open a Helpdesk
ticket.