Key Ground Requirements

1
Topics of Discussion

• Key Ground Requirements
• Ground System and Data Flow
• Mission Planning
• Top Level Data Collection Operations Concept
• Routine Operations

• The Ground System will receive a major review at
  the Delta Mission Operations Review (MDR) in
  January 1999.

2
Ground System Requirements Summary
Ground stations to receive, process, and route
science and housekeeping data to GSFC

• X-Band
• Receive up to 80 Gbits of science data each day
  at 105 Mbps
• Record the received X-band data on hard media,
  mail to GSFC, and store raw data for 30 days
• S-Band Receive data at selected rates up to 2
  Mbps
• Housekeeping data Route selected virtual
  channels to GSFC in real time, record up to 200
  Mbits of data each day, and FTP recorded data to
  GSFC within one hour. Store raw data for 30 days.
• Backup science data (up to 10 Gbits per day)
  Process as with X-Band

3
Data Collection Event (DCE) Requirements

Scenes Over Typical Scenes Instrument Science
Mission Per DCE ALI 1,000 1 Hyperion 6,000 6 AC 1,
000 1

• Generally, all three instruments will be
  collecting data simultaneously, but separate
  operations are possible
• Typically, three DCEs per day will be required
• Approximately 12 Gbits per DCE

4
Ground System Science Data Processing
Requirements Summary

• GSFC to receive and process data sent from the
  ground station
• Perform Level 0 processing on the science data
• Fill Holes, reorder science into band order
• Archive raw and processed data
• Ship Level 0 science data to the Science
  Validation Facility (SVF)

5
EO-1 Ground System and Data Flow Early Orbit
Testing Phase (Launch to Launch 2 month)
6
EO-1 Ground System and Data Flow Science
Validation Phase (Launch 2 month to Launch 12
months)
Science Working Group Lead
Coord Committee - SWG Lead - Stennis Lead
- Commercial - Education Outreach -
Other Agencies
ALI, AC, Hyperion scene requests
WARP Playback Science State of Health
Mission Operations Center (MOC) at GSFC
(building 14 rm N285)
Policy
Real-time Telemetry Launch Support

• RT State of Health - VC0
• Playbck State of Health
• Post Pass - VC1
• Significant Events - VC2

• Core Ground System (CGS)
• Command and control
• Health and Safety monitoring
• Trending
• Command Management Sys
• S-Band Science Data Processing
• Data Processing System (DPS)
• X-Band Science Data Processing
• Level 0
• Mission Ops Planning Scheduling
• System (MOPSS)
• Planning and Scheduling
• Flight Dynamics System (FDS)
• Orbit
• Attitude

Schedule conflicts
TDRSS/ WSC
Orb and Att Data
Hyperion scene requests
EO-1 Mission Science Office
X and S Band Playback Real-time Telemetry Command
Tables Memory Loads Commands Landsat 7 State
Vectors
EO-1 Science Scheduling Plan
X or S Band Playback
Rate Buffer Housekeeping Playback

• Science Planning

Real-time Telemetry and Command
Doppler / Angles
EO-1 Science Validation Facility
Spitzbergen (Prime)
Level 0 Data by DLT
Real-time Telemetry
NASA Integrated Services Network (NISN)

• Level-1 Processing - Radiometric
  - Atmospheric
• Data Archive
• Data Distribution
• Image Assessment
• Calibration

Level 0 data by DLT
Orbit predicts
Formation Flying Coordination
Landsat 7 State Vectors
SSC (Mississippi)
Alaska, Wallops (Backup / Launch)

• Process Hyperion level 1 data higher
• Commercialization planning

Landsat 7 MOC at GSFC
X or S Band Playback
Hyp Level 1 Data
Hyp scene requests
McMurdo (Launch / Maneuvers)
Other Agencies
MS Pan, AC level 0 and Level 1 Data
TRW - Eng Sup
SSC S, X band (Tach Demo and Launch / Backup)
Hyp scene requests
Commercial
Hyp scene requests
Hyperion level 0 and level 1 data

• MS/PAN scenes
• AC scenes
• Landsat/EO-1 paired scenes

Hyperion level 1 data higher by tape or CD
Educational
7
EO-1 Ground System and Data Flow Science
Production Phase (Launch 12 month to Launch
24 months, presently unfunded)
Science Working Group Lead
Coord Committee - SWG Lead - Stennis Lead
- Commercial - Education Outreach -
Other Agencies
ALI, AC, Hyperion scene requests
WARP Playback Science State of Health
Mission Operations Center (MOC) at GSFC
(building 14 rm N285)
Policy
Real-time Telemetry Launch Support

• RT State of Health - VC0
• Playbck State of Health
• Post Pass - VC1
• Significant Events - VC2

• Core Ground System (CGS)
• Command and control
• Health and Safety monitoring
• Trending
• Command Management Sys
• S-Band Science Data Processing
• Data Processing System (DPS)
• X-Band Science Data Processing
• Level 0
• Mission Ops Planning Scheduling
• System (MOPSS)
• Planning and Scheduling
• Flight Dynamics System (FDS)
• Orbit
• Attitude

Schedule conflicts
TDRSS/ WSC
Orb and Att Data
Hyperion scene requests
EO-1 Mission Science Office
X and S Band Playback Real-time Telemetry Command
Tables Memory Loads Commands Landsat 7 State
Vectors
EO-1 Science Scheduling Plan
X or S Band Playback
Rate Buffer Housekeeping Playback

• Science Planning

Real-time Telemetry and Command
Doppler / Angles
EO-1 Science Validation Facility
Spitzbergen (Prime)
Level 0 Data by DLT
Real-time Telemetry
NASA Integrated Services Network (NISN)

• Level-1 Processing - Radiometric
  - Atmospheric
• Data Archive
• Data Distribution
• Image Assessment
• Calibration

Level 0 data by DLT
Orbit predicts
Formation Flying Coordination
Landsat 7 State Vectors
SSC (Mississippi)
Alaska, Wallops (Backup / Launch)

• Process Hyperion level 1 data higher
• Commercialization planning

Landsat 7 MOC at GSFC
X or S Band Playback
Hyp Level 1 Data
Hyp scene requests
McMurdo (Launch / Maneuvers)
Other Agencies
MS Pan, AC level 0 and Level 1 Data
TRW - Eng Sup
SSC S, X band (Tach Demo and Launch / Backup)
Hyp scene requests
Commercial
Hyp scene requests
Hyperion level 0 and level 1 data

• MS/PAN scenes
• AC scenes
• Landsat/EO-1 paired scenes

Hyperion level 1 data higher by tape or CD
Educational
8
Typical EO-1 Mission Planning Timeline
9
Typical Mission Planning Process

• .

10
EO-1 Integrated Image Timeline
IMAGING
Biasing Wheels
Zeroing Bias (Opt)
Nadir Slew (Opt)
Slew
Hold
Track
Track
Ramp
Stopped
Off
Operate
Off
Image
Operate
Idle
Standby
Idle
Standby
Cover Open
Cover Close
Lamp Ops
Image (2s ea. Side)
Dk / Lamp Cal
Idle
Active
Idle
Cover Open
Cover Close
Lamp Ops
Lamp Cal
Dark Cal
Dark Cal
Img
Standard Operations
SCI Collect
Std Ops
-660 -540 -420 -300 -180 -60 60 180 Time
(Seconds)
27 Sec.
27 Sec.
0
11
Top Level Data Collection Ops Concept

• 15 orbits per day ? 8 orbits in Data Collection,
  Power Balance Limit
• Need one orbit to prepare momentum management
  (Less depending on the latitudes of each DCE)
• Take approximately 1,000 DCEs for 10 months 3
  DCEs/day
• Total data volume/day ? 80 Gbit
• Typically dump science data twice daily
• No attitude change on a given orbit to acquire a
  new target
• Typical DCEs have 6 Hyperion hypercubes, 1 ALI
  scene, and 1 AC scene

12
Routine Ops

• ALI images per day 3
• AC images per day 3
• Hyperion cubes per day 18
• Lunar Cals
• Hyperion / ALI / AC 1 per week (early orbit)
• Hyperion / ALI / AC 1 per month (routine ops)
• Solar Cals
• Hyperion 1 per week(early orbit/routine)
• ALI / AC 1 per week (early orbit)
• ALI / AC 1 per month(routine ops)
• Orbit maneuvers
• Establish formation (early orbit) - 6 (function
  of insertion)
• Maintain formation (routine ops) - 1 to 2 per
  week (function of Landsat-7 maneuver philosophy)

13
Routine Ops(continued)

• Stored command loads Daily (early orbit) 1 to
  3 per week (routine ops)
• WARP Science downlinks 2 per day
• Housekeeping data downlinks 3 per day
• Momentum bias commanding 1 per DCE
• NADIR offset attitude maneuver 1 per DCE
• Solar Array tracking suspended (Jitter
  minimization) Each DCE
• Landsat 7 vector ephemerias Daily (routine ops)
• Landsat maneuver plan upload Weekly (routine
  ops)
• Technology commands Varies

14
Backup Slides
15
EO-1 Ground System Operations Key Documents

• EO-1 Data Management Plan 7/98
• EO-1 Ground System Design Review (SDR) / Mission
  Operations Review (MOR) 11/97
• EO-1 Ops Concept 8/98
• Detailed Mission Requirements (DMR) 7/98
• EO-1 Space to Ground ICD 7/98
• EO-1 Mission Operations Center (MOC) to Science
  Validation Facility ICD 7/98
• EO-1 ICD for Radiometric Calibration Processing
  and Performance Assessment 2/98
• Mission Operations Support Plan 9/98
• Mission Procedure Document 12/98

16
EO-1 Ground System OperationsKey Events

• Ground Release 1
• Core Ground System (ASIST) 6/98
• MOPSS 7/98
• FDS 7/98
• DPS 8/98
• MOC Facility ready 10/30
• Slipped due to delay of Wind/Polar giving up
  their facility
• Delta Mission Operations Review (MOR) 1/99
• Ground Release 2 Approx. 1/99
• Launch Overflow Facility ready 6/99
• Ground Release 3 Approx. 7/99
• Operational Readiness Review 11/99

17
Operations Considerations

• Momentum management
• Satellite power management
• Off-track pointing
• Folding in cloud cover in the planning Alternate
  targets
• Guaranteed data requirements
• Single shift for operations
• Automation
• Lessons learned from Lewis
• Possible lessons learned from SOHO

18
Data Collection Considerations

• Orbit period 98.88 min therefore 14.53
  orbits/day
• U.S. crossing duration 4.5 - 7 minutes
• Number of orbits that EO-1 can see U.S. 3 per
  day, however can get 4th with offtrack pointing
• No daytime passes over the U.S and South America
  on a descending node
• Approximately 300 seconds of set up time for each
  Hyperion image regardless of length
• Basic scene size is 0.6 Gbit for Hyperion
  hypercube and 2.2 Gbit for ALI and SCnot
  necessarily sequential

19
Mission Operations Phases and Modes

• Prelaunch Planning and Testing
• Development of requirements, implementation of
  requirements via development and operation of
  system.
• S/C Modes - Test
• Launch and Early Orbit Checkout
• Final on-launch preparations launch, launcher
  trajectory, injection, separation. EO-1
  activation, stabilization, deployment, initial
  acquisition, mission orbit insertion
• S/C Modes - Pre-launch, Ascent, Initial
  acquisition, Normal, Orbit adjust, Safe
• On-orbit verification
• Checkout and calibration of S/C and instruments.
  Validation of S/C control

20
Mission Operations Phases and Modes

• On-orbit verification
• S/C modes - Normal, Calibration, Safe
• Formation Flying
• Maintain close separation from Landsat. Science
  validation of ALI, Hyperion and AC. Prototype
  science application.
• S/C Modes - Orbit adjust, Normal, Safe, Special
  Technology
• Extended Mission
• After one year of operations
• S/C modes - Orbit adjust, Normal, Safe, Special
  Technology