1. CDAAC-2 architecture 1

2. COSMIC-2 subsystems 2 1.Clock subsystem Ground GNSS data Navigation bits Weather models IGS products Clock products, Zenith Tropospheric Delays 2.Data Management System/IO machines COSMIC-2 level 0 LEO data Dump schedules Two Line Elements Coordination between DPC’s, RTS’s and NSPO/SOCC 3.LEO processing subsystem Clocks, LEO data Data products Output

3. CDAAC-2 DPC Architecture cosmic-io VIP Users (weather centers) lepus-a/b/c ground-io (GNSS Clock Subsystem) ground-io (GNSS Clock Subsystem) cdaac-www COSMIC and MOO data leo-a/b/c (RT Processing Cluster) leo-a/b/c (RT Processing Cluster) c2-io (DMS) c2-io (DMS) Users Streaming GNSS data and bit-grabber data NOAA weather models IGS/CODE products COSMIC-2 LEO data New for C2 Existing CDAAC Output Input Real-time weather data Research data Real-time weather data Post/Re-processing systems not shown

4. IT security context Users Cheyenne data center GNSS ground data NOAA weather models IGS products COSMIC-2 LEO data Mesa Lab data center COSMIC-2 PG/D NOAA SWPC NOAA NCEP/GTS AFWA International Partners

5. Clock subsystem cosmic-io VIP Users (weather centers) lepus-a/b/c ground-io (GNSS Clock Subsystem) ground-io (GNSS Clock Subsystem) cdaac-www COSMIC and MOO data leo-a/b/c (RT Processing Cluster) leo-a/b/c (RT Processing Cluster) c2-io (DMS) c2-io (DMS) Users Streaming GNSS data and bit-grabber data NOAA weather models IGS/CODE products COSMIC-2 LEO data New for C2 Existing CDAAC Output Input Real-time weather data Research data Real-time weather data Post/Re-processing systems not shown Clock subsystem

6. Clock subsystem details vm_ml1 NTRIP caster NTRIP client FID-o backup vm_ml1 NTRIP caster NTRIP client FID-o backup NTRIP GNSS stream NOAA weather models IGS/CODE products vm_ch1 NTRIP caster NTRIP client FID-o vm_ch1 NTRIP caster NTRIP client FID-o bit-grabber data 50 stations gnssCH1 clock generation GNSS bits FetchRT gnssCH1 clock generation GNSS bits FetchRT gnssBO1 clock generation GNSS bits FetchRT gnssBO1 clock generation GNSS bits FetchRT NTRIP files LEO processing (C-1 and C-2, Cheyenne and Boulder) LEO processing (C-1 and C-2, Cheyenne and Boulder) CheyenneMesa lab NTRIP files external LEO processing (TACC and Brazil) clock and model files

7. DMS subsystem cosmic-io VIP Users (weather centers) lepus-a/b/c ground-io (GNSS Clock Subsystem) ground-io (GNSS Clock Subsystem) cdaac-www COSMIC and MOO data leo-a/b/c (RT Processing Cluster) leo-a/b/c (RT Processing Cluster) c2-io (DMS) c2-io (DMS) Users Streaming GNSS data and bit-grabber data NOAA weather models IGS/CODE products COSMIC-2 LEO data New for C2 Existing CDAAC Output Input Real-time weather data Research data Real-time weather data Post/Re-processing systems not shown DMS subsystem

8. DMS/LEO subsystem details DMS_ioML FetchRT.pm forwardFiles.pl Database Web Monitoring DMS_ioML FetchRT.pm forwardFiles.pl Database Web Monitoring COSMIC 2 data from various RTS DMS_ioCH FetchRT.pm forwardFiles.pl Database Web Monitoring DMS_ioCH FetchRT.pm forwardFiles.pl Database Web Monitoring Pass Schedules TLE Files Leo-a-CH Leo Processing Leo-a-CH Leo Processing Leo-b-ML Leo Processing Leo-b-ML Leo Processing COSMIC 2 input files Other DPC (TACC, BRAZIL, NSPO) COSMIC 2 input files CheyenneMesa lab Schedule files Input level 0 NFS mount VIP users, CDAAC-WWW FTPS push Output level 0 Output data products COSMIC 2 input files

9. Backup TT&C Commercial RTS TLE FILES Celestrack USAF RTS UCAR DMS TLE Files Schedule Files Email for schedule changes and passes not received VC1 - VC5 Files NSPO SOCC BRAZIL RTS DPC’s CDAAC TACC BRAZIL FTP Pull Initial Schedule FTPS Push Initial Schedule FTP Push Deleted supports FTP Pull NSPO sends Schedule VC1 - VC5 Files FTPS Push VC2 - VC5 Forward Files, Complete Set Script Port 55555 VC1 - VC5 Files FTPS Push VC1 - VC5 Files FTP Push NSPO TT&C CMDs, status, Cortex TLM, Cortex status, Schedules, VC0-VC5 TLE FILES Celestrack VC1 – VC5 FTP Push Key DMS external data flows