Add Release_Notes.gfs.v16.1.3.txt for DO-3 implementation

Ref: #420

docs/Release_Notes.gfs.v16.1.3.txt

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+GFS V16.1.3 RELEASE NOTES
+
+
+PRELUDE
+
+  NOAA awarded Delivery Order 3 (DO-3) of its commercial radio occultation
+  (RO) data purchase to Spire Global on August 12, 2021.  This purchase 
+  covers 3000 occultations per day over a six month period with the data 
+  flow starting on September 16, 2021.  On the same date, the GeoOptics 
+  data from Delivery Order 2 (DO-2) will be discontinued.
+
+  GNSSRO bending angle observations from GeoOptics and Spire were initially 
+  evaluated as part of Delivery Order 1 (DO-1), covering a 30-day period 
+  starting on December 15, 2020.  The data from both vendors were found to 
+  be of similar quality to other operationally assimilated RO data.  Low 
+  resolution experiments informed the configuration of the quality control 
+  and observation errors for the following DO-2, which was awarded to 
+  GeoOptics only, covering an average of 1300 occultations per day over a 
+  six month period starting on March 17, 2021.  These data began to be 
+  assimilated operationally with the implementation of GFSv16.1.1 on 
+  May 22, 2021 after two months of parallel testing at full resolution.
+
+  Following the v16.1.1 implementation, the observation errors for 
+  commercial RO were tuned to better utilize the new data.  Additionally, 
+  two fixes related to the handling of super-refractivity in the RO bending 
+  angle observation operator were added.  These fixes resolve minimization 
+  issues that were related to the increased vertical resolution in v16. 
+  Therefore, the stricter gross check quality control measures originally 
+  put in place to mitigate minimization problems will now be relaxed.  
+
+  This implementation plans to:
+    * Turn off the active assimilation of GeoOptics data
+    * Turn on the active assimilation of Spire data
+    * Adjust the observation errors for the Spire data
+    * Address two issues within the RO bending angle observation operator
+    * Relax the strict gross check added because of those issues.
+
+  These changes only affect two files within the GSI tag of the global workflow.
+
+
+IMPLEMENTATION INSTRUCTIONS
+
+  The NOAA VLab and both the NOAA-EMC and NCAR organization spaces on GitHub.com 
+  are used to manage the GFS.v16.1.3 code. The SPA(s) handling the GFS.v16.1.3 
+  implementation need to have permissions to clone VLab gerrit repositories and 
+  the private NCAR UPP_GTG repository. All NOAA-EMC organization repositories are 
+  publicly readable and do not require access permissions.  Please follow the 
+  following steps to install the package on WCOSS-Dell:
+
+  1) cd $NWROOTp3
+
+  2) mkdir gfs.v16.1.3
+
+  3) cd gfs.v16.1.3
+
+  4) git clone -b EMC-v16.1.3  https://github.com/NOAA-EMC/global-workflow.git .
+
+  5) cd sorc
+
+  6) ./checkout.sh -o
+     * This script extracts the following GFS components:
+         MODEL     tag GFS.v16.0.16                  Jun.Wang@noaa.gov
+         GSI       tag gfsda.v16.1.3                 Russ.Treadon@noaa.gov
+         GLDAS     tag gldas_gfsv16_release.v1.12.0  Helin.Wei@noaa.gov
+         UFS_UTILS tag ops-gfsv16.0.0                George.Gayno@noaa.gov
+         POST      tag upp_gfsv16_release.v1.1.4     Wen.Meng@noaa.gov
+         WAFS      tag gfs_wafs.v6.0.22              Yali.Mao@noaa.gov
+
+  7) ./build_all.sh
+     * This script compiles all GFS components. Runtime output from the build for 
+       each package is written to log files in directory logs. To build an 
+       individual program, for instance, gsi, use build_gsi.sh.
+
+  8) ./link_fv3gfs.sh nco dell	
+
+
+SORC CHANGES
+
+* sorc/
+  * checkout.sh will checkout the following changed model tags:
+    * GSI; tag gfsda.v16.1.3 
+      * src/gsi/setupbend.f90:  Add two fixes for handling of 
+        super-refractivity layer, change the observation errors
+        of the commercial data, relax stricter gross check back to 
+        original values 
+
+
+FIX CHANGES
+
+* fix/fix_gsi:
+  * global_convinfo.txt: Discontinue assimilating GeoOptics and 
+    begin assimilating Spire, relax stricter gross check back to
+    original values.
+  * gfsv16_historical/: Add fix files for retrospective parallels.
+    Does not impact operations.
+
+
+PARM/CONFIG CHANGES
+
+* parm/config/config.anal:  Add historical fix file entries.  Does
+  not impact operations.
+
+
+JOBS CHANGES
+
+* No change from GFS v16.1.2
+
+
+SCRIPT CHANGES
+
+* No change from GFS v16.1.2
+
+
+CHANGES TO RESOURCES AND FILE SIZES
+
+  There should be no change in analysis runtime nor cnvstat file size
+  greater than the normal cycle to cycle variation.
+
+
+PRE-IMPLEMENTATION TESTING REQUIREMENTS
+
+* Which production jobs should be tested as part of this implementation?
+  * The entire GFS v16.1.3 package needs to be installed and tested. 
+
+* Does this change require a 30-day evaluation?
+  * No.
+
+
+DISSEMINATION INFORMATION
+
+* Where should this output be sent?
+  * No change from GFS v16.1.2
+
+* Who are the users?
+  * No change from GFS v16.1.2
+
+* Which output files should be transferred from PROD WCOSS to DEV WCOSS?
+  * No change from GFS v16.1.2
+
+* Directory changes
+  * No change from GFS v16.1.2
+
+* File changes
+  * No change from GFS v16.1.2
+
+
+HPSS ARCHIVE
+
+* No change from GFS v16.1.2
+
+
+JOB DEPENDENCIES AND FLOW DIAGRAM
+
+* No change from GFS v16.1.2
+