It has been decided to remove historical files from the fix repository except 
for this directory which is used for testing the v16.x upgrade only.  The dates
of the files are a mix of first possible use and implementation dates. 

global_convinfo.txt.2019021900: "Baseline"
global_convinfo.txt.2019110706: Switch from GOES-15 to GOES-17 AMVs, switch on KOMPSAT-5 AMVs
global_convinfo.txt.2020040718: Turn on Canadian AMDAR (Winds and Temperature below 850hPa)  
                                See also prepobs_errtable.global.2020040718
global_convinfo.txt.2020052612: Turn on COSMIC-2 GPSRO
global_convinfo.txt.2020082412: Turn on hurricane recon obs (T,q)
                                See also prepobs_errtable.global.2020082412
global_convinfo.txt.2020091612: Turn on MetOp-C GRAS (GPSRO)
global_convinfo.txt.2021031712: GPSRO data buy DO-2 (GeoOptics)
global_convinfo.txt.2021091612: Refine GPSRO obs errors; GPSRO DO-3 (Spire)
global_convinfo.txt.2022031612: GPSRO DO-4 (Spire and GeoOptics), uv 224 vadwnd off
global_ozinfo.txt.2019021900: "Baseline:
global_ozinfo.txt.2020011600: Turn off S-NPP OMPS Nadir Profiler and Total Column product 
global_ozinfo.txt.2020011806: Turn on S-NPP OMPS Nadir Profiler and Total Column product again
global_satinfo.txt.2019021900: "Baseline"
global_satinfo.txt.2019110706: Turn on Metop-C AMSU-A and MHS
global_satinfo.txt.2020022012: Turn off MetOp-A MHS
global_satinfo.txt.2021052118: Turn off S-NPP CrIS
global_satinfo.txt.2021092206: Turn off Metop-A IASI
global_satinfo.txt.2021102612: Turn on MetOp-C IASI; Remove Aqua AIRS
prepobs_errtable.global.2019021900: "Baseline"
prepobs_errtable.global.2019110706: Double observation error for NESDIS AMVs