# Presentation: 726998

## EOS Polar Ground Stations (EPGS) Robert L. StelmaszekEPGS Project ManagerCode 452Phone 301.286.5263September 15-16, 1999

- Sept 15-16, 1999

## EPGS Topics

**Current Status**
**Architecture**
**EPGS Support for ICESat**
**Logistics, Staffing, and Documentation**
**Development Schedule**
**Issues & Concerns**

- Sept 15-16, 1999

## EPGS Status

**All EOS Polar Ground Stations (AGS, SGS, WGS) fully operational**
**EPGS successfully supported QuikSCAT and Landsat-7 launches**
- AGS and SGS provide continuing operational support with approximately 32 Landsat-7 and 107 QuikSCAT passes per week
**EPGS continues participation in Mission Readiness Testing in preparation for Terra launch and flight operations**

- Sept 15-16, 1999

## EPGS Status (cont’d)

- Sept 15-16, 1999

## EPGS End-to-End Reference Architecture

- Sept 15-16, 1999

## EPGS Support for ICESat

**X-Band Downlink**
- Receive, bit synchronize and forward 40 Mbps science data to GSIF (collocated with ground stations)
**S-Band Downlink**
- Receive and bit synchronize playback HK data (262.144 kbps) and real time HK data (4.096 or 16.384 kbps)
- Real-time HK data sent directly to MOC during pass
- Playback HK data is stored on SAFS and transferred to EDOS post pass
**S-band Uplink**
- Transmit spacecraft commands (2 kbps) from the MOC via the NISN provided common carrier

- Sept 15-16, 1999

## EPGS Support for ICESat (cont’d)

**Tracking**
- Generate two-way and one-way S-band Doppler tracking data and FTP UTDF files to ICESat MOC/FDS via NISN provided common carrier
- Provide MMFD certified angle tracking data (0.1 degree RMS accuracy)  from 11.3-meter antenna to MMFD during LEOP (prior to on-board GPS certification)
**X-band and S-band link parameters have been defined in 452-RFICD-EPGS/ICESat, RF Interface Control Document Between the ICESat Spacecraft and the EOS Polar Ground Stations**
**McMurdo Ground Station will be available as a non-launch critical back-up resource for S-band telemetry (RT and playback) and commanding**

- Sept 15-16, 1999

## EPGS Scheduling and Status Reporting

**Anticipated contact scenario**
- Launch +120 days (calibration): Up to one contact every available pass
- Normal Operations: At least one contact every six hours
**EPGS scheduling is performed by the Wallops Orbital Tracking Information System (WOTIS)**
- ICESat MOC/WOTIS interface will be similar to QuikSCAT MOC interface
- WOTIS will receive schedule requests, distribute final schedules to MOC and ground stations, and provide post pass reports to MOC
- Real-time status reporting is also available directly from ground stations

- Sept 15-16, 1999

## Typical WOTIS File Interchange Timeline 

- Sept 15-16, 1999

## Logistics
SGS, AGS and WGS sparing plan lists all critical and non-critical spares
Approximately 150 critical hardware items are identified in plan
All critical spares have been ordered and approximately 50% are on-site
Remaining critical spares due on-site by mid Nov. 1999
Training and Certification
All staff training and certification completed for ongoing missions and for upcoming Terra mission
Station Staffing
Provide on-site staffing during launch and all LEOP contacts
Respond to requests for critical/emergency support within 2 hours

- SGS, AGS and WGS sparing plan lists all critical and non-critical spares
- Approximately 150 critical hardware items are identified in plan
- All critical spares have been ordered and approximately 50% are on-site
- Remaining critical spares due on-site by mid Nov. 1999
**Training and Certification**
- All staff training and certification completed for ongoing missions and for upcoming Terra mission
**Station Staffing**
- Provide on-site staffing during launch and all LEOP contacts
- Respond to requests for critical/emergency support within 2 hours

- Sept 15-16, 1999

## Operations Documentation
Operations Concept document - Complete
AGS/SGS Station Handbooks - Complete
AGS/SGS Station Manual - Complete
Network Operations Support Plan (NOSP) - First draft scheduled for mid 2000
Logistics/Spares update scheduled for fall 2000
Y2K Certification
Ground Network certification accomplished 3/31/99

- Operations Concept document - Complete
- AGS/SGS Station Handbooks - Complete
- AGS/SGS Station Manual - Complete
- Network Operations Support Plan (NOSP) - First draft scheduled for mid 2000
- Logistics/Spares update scheduled for fall 2000
**Y2K Certification**
- Ground Network certification accomplished 3/31/99

- Sept 15-16, 1999

## EPGS Documentation Access

**EPGS documents will be available on the Web by 15 Oct.**
- Documentation located at: http://nmsp.gsfc.nasa.gov/
**Automation software documentation is available via the Code 584 Web site**
- http://www.wff.nasa.gov/~code584/awots.html
- Includes software support documentation, installation and upgrade information, and requirements documentation

- Sept 15-16, 1999

## EPGS Development Schedule for ICESat 

**EPGS Development Schedule for ICESat**

- Sept 15-16, 1999

## EPGS Project Concerns/Issues for ICESat

**None**

- Sept 15-16, 1999