Roger Flaherty,

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Roger Flaherty, Deputy Program Manager GSFC Code
450 July, 2002
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AGENDA

• Mission Services Program Office Overview
• Space Network
• Ground Network

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MISSION SERVICES PROGRAM OFFICE
THE MSPO IS RESPONSIBLE FOR PROGRAM PLANNING,
DIRECTION, AND OPERATION OF NASAs SPACEFLIGHT
TRACKING AND DATA NETWORK (STDN)

• MANAGEMENT OF THE TRACKING/DATA COMMUNICATIONS
  FACILITIES INCLUDING SPACE AND GROUND NETWORKS
  AND SYSTEMS, PROVIDING DAY-TO-DAY SUPPORT OF
  LAUNCH AND ORBITAL ACTIVITIES
• ICD/MOA/INOSP DEVELOPMENT
• IMPROVEMENTS AND UPGRADES OF PRESENT NETWORKS
  SYSTEMS TO IMPROVE CURRENT USER SERVICE
  CAPABILITIES
• ESTABLISHMENT OF LONG RANGE TECHNOLOGY
  INITIATIVES TO MEET FUTURE USER SERVICE
  REQUIREMENTS
• PROVISION OF NETWORKS INSTITUTIONAL SUPPORT
• CONTROL OF 530-SNUG (SPACE NETWORK USERS GUIDE)
• CSOC CONTRACT MANAGEMENT

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SPACE NETWORK
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Space Network Concept

• THE SPACE NETWORK (SN) WAS ESTABLISHED TO REPLACE
  NASAs WORLDWIDE NETWORK OF GROUND TRACKING
  STATIONS
• THE SN DRAMATICALLY INCREASED TRACKING AND DATA
  ACQUISITION (TDA) COVERAGE FROM 15 TO 85 PER
  ORBIT OF LOW EARTH ORBITING SPACECRAFT AS WELL AS
  DECREASED OPERATIONAL COSTS
• ADDITION OF THE GUAM REMOTE GROUND TERMINAL IN
  1998 FURTHER INCREASED TDA COVERAGE TO 100 FOR
  ALL CUSTOMERS BY PROVIDING CLOSURE TO THE TDRSS
  ZONE OF EXCLUSION
• THE SN OPERATES AS A CUSTOMER DRIVEN BENT PIPE
  RELAY SYSTEM FOR TRACKING, TELEMETRY, AND COMMAND
  DATA

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TDRSS COVERAGE
GODDARD SPACE
FLIGHT CENTER
WALLOPS FLIGHT
FACILITY
GUAM
254
94
174 TDW
TDW
321
41 TDE
121
355
195
127
47 TDS
275 TDZ
327
91
251
F-7
171 F-7
0/360
180W
-180W
TDRS VIEWS BASED ON 600KM USER ALTITUDE AT THE
EQUATOR
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Tracking and Data Relay Satellites (TDRS)
First Generation TDRS F-1 through F-7
Second Generation TDRS F-8 through F-10
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GROUND SEGMENT

• WHITE SANDS COMPLEX (WSC)
• TWO INDEPENDENT, FUNCTIONALLY IDENTICAL TDRS
  GROUND STATIONS LOCATED NEAR LAS CRUCES, NM FOR
  CONTROLLING THE TDRS
• WSC ALTERNATIVE RESOURCE TERMINAL (WART) FOR
  TDRS-1 IN SUPPORT TO NSF
• DATA SERVICES MANAGEMENT CENTER (DSMC)
• OPERATIONAL HUB LOCATED AT THE WSC FOR
  COORDINATING ALL SPACE NETWORK ACTIVITIES
• GUAM REMOTE GROUND TERMINAL
• PROVIDES ZOE CLOSURE USING TDZ

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White Sands Complex

• TWO FUNCTIONALLY IDENTICAL, GEOGRAPHICALLY
  SEPARATED GROUND TERMINALS AT THE WHITE SANDS
  TEST FACILITY

THE WSC HAS FIVE SPACE TO GROUND LINK TERMINALS
(SGLTs) A SIXTH SGLT HAS BEEN INSTALLED AT THE
REMOTE GROUND TERMINAL ON GUAM AS AN EXTENDED WSC
SGLT THE WSC ALTERNATIVE RESOURCE TERMINAL
(WART) FUNCTION IS USED TO COMMAND AND CONTROL
TDRS-1 AND PROVIDES S-BAND (SSAF/SSAR) AND K-BAND
(KSAR) SERVICES TO NSF ONLY SERVICES UNABLE TO
SUPPORT ON-ORBIT USERS
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DSMC FUNCTIONS

• SERVICE PLANNING
• DATABASE MANAGEMENT
• ACRS (FORWARD AND RETURN LINK MUTUAL INTERFERENCE
  PREDICTION)
• SCHEDULING
• FORECAST PERIOD
• ACTIVE PERIOD
• CONFLICT RESOLUTION
• MISSION OPERATIONS SUPPORT
• EVENT MONITORING
• REAL TIME FAULT ISOLATION

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TDRSS SERVICES

• MISSION PLANNING
• REQUIREMENTS DEFINITION, ENGINEERING, AND
  INTEGRATION
• COMMUNICATIONS LINK ANALYSIS AND SIMULATION
  SYSTEM (CLASS)
• END-TO-END RF SYSTEMS ANALYSIS
• TESTING
• CHARACTERIZATION, AND VERIFICATION/VALIDATION
  TESTING FOR EVALUATING MISSION READINESS
• INTERFACE COMPATIBILITY TESTING FOR RF AND GROUND
  DATA INTERFACES

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TDRSS SERVICES (CONTD)

• OPERATIONS PLANNING
• DEVELOP AND COORDINATE THE IMPLEMENTATION OF
  APPROVED NETWORK ENHANCEMENTS TO SUPPORT NEW AND
  EVOLVING REQUIREMENTS
• ENSURE SN ELEMENTS ARE PREPARED TO SUPPORT
  MISSION REQUIREMENTS. IMPLEMENT NECESSARY
  DATABASE CONNECTIVITIES.
• PRE LAUNCH SUPPORT
• PAYLOAD LAUNCH VEHICLE RF CHECKOUT
• LAUNCH SUPPORT
• TRACKING AND DATA ACQUISITION VIA TDRSS

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TDRSS SERVICES (CONTD)

• COMMAND
• COMMANDS TRANSMITTED DIRECTLY VIA NISN TO WSC
• WSC UPLINKS COMMANDS TO TDRS FOR RF TRANSMISSION
  TO CUSTOMER S/C
• TELEMETRY
• CUSTOMER DATA RECEIVED VIA TDRS AT WSC
• WSC DOWN CONVERTS, DEMODULATES, BIT SYNCHRONIZES,
  CONVOLUTIONALLY DECODES, RECORDS DATA, AND SENDS
  ASYNCHRONOUS DATA TO NISN EQUIPMENT FOR
  TRANSMISSION TO CUSTOMERS IN IP OR ENCAPSULATED
  4800 BIT BLOCK FORMAT

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TDRSS SERVICES (CONTD)

• TRACKING
• ONE-WAY DOPPLER FOR FREQUENCY DETERMINATION
• RANGE USING DG-1 PN CODE AND 2-WAY DOPPLER
  TRACKING
• CONTROL/STATUS
• TDRSS LINK CONTROL MESSAGES AND PERFORMANCE
  MONITORING DATA

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Service Summary/System Capacity
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TDRSS/TDRS-H,I,J Baseline Service Comparison
SERVICE
TDRSS
TDRS - H,I,J
NOTES
300 kbps
FWD
300 kbps
S-BAND
RTN
6 Mbps
6 Mbps
SINGLE
NO CHANGE
FWD
ACCESS
25 Mbps
25 Mbps
Ku-BAND
RTN
300 Mbps
300 Mbps
FWD
N/A
25 Mbps
23/25-27 GHz frequency
Ka-BAND
band
RTN
N/A
800 Mbps
FOR TDRS H,I,J
SIMULTANEOUS
NUMBER OF
2 SSA
2 SSA
LINKS PER
OPERATION OF S Ku
2 KuSA
2 KuSA
AND S Ka SERVICES
SPACECRAFT
2 KaSA
A SINGLE SA ANTENNA
ARE REQUIRED
1 _at_ 10 kbps (8 dB
ANTICIPATED SSA
FWD
1 _at_ 10 kbps
NUMBER
over TDRSS)
USERS LESS THAN 3
MULTIPLE
OF
5 _at_ 150 kbps LIMITED BY GROUND EQ. ONLY
6 _at_ 3 Mbps (ONBOARD BEAMFORMING)
Mbps OFFLAOADED TO
ACCESS
LINKS
RTN
TDRS H,I,J MA
PER S/C
CUSTOMER TRACKING
150 meters 3 sigma
150 meters 3 sigma
NO CHANGE
Beyond 300 Mbps requires Ground Station
Modification
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Demand Access Service (DAS)

• DAS is an MA return service that utilizes 3 TDRS
  (F-3 F-7) nodes (0410W, 1740W, 2750W) to
  provide continuous global coverage.
• A single user schedule can provide multi-year
  support
• DAS automatically hands over from TDRS node to
  node for orbiting users
• Data Rate from 1-150kbps/channel
• Customers use TCP/IP interface
• Low Cost based on node usage (subscription fee)
• DAS Applications
• Emergency/Contingency (911 service) customer
  transmits when problem occurs. DAS is always
  listening
• Science Alerts Transmit when significant
  observations occur

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Ka-Band Technology Development

• In early 2000, NASA/GSFC initiated the Ka-band
  Transition Project as a first step in
  transitioning the SN and GN to Ka-band
  operations.
• Project Goals
• Develop new SN high rate telemetry service using
  TDRS H,I,J 650 MHz wide channel
• Develop a GN station to demonstrate direct to
  earth Ka-band operations
• Provide test bed within the SN and GN to
  demonstrate new communication technologies
• High data rate demonstrations scheduled for fall
  2002
• Ground Network
• Implement a demonstration ground terminal for the
  Wallops Flight Facility to support direct to
  ground links in the 25.5 to 27.0 GHz band
• Provide a 1200 MHz IF compatible with the SN
  implementation
• Support unified S-band for command and
  housekeeping telemetry

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Ka-Band Technology Development

• Space Network
• Upgrade SGLTs to take advantage of TDRS H,I,J 650
  MHz wide Ka-band channel
• Add new Downconverters, Equalizers, and IF
  switching
• Modify network control software for automated
  control and monitoring of new equipment
• Provide Ka-band return signals at a 1200 MHz IF
  compatible with the GN IF interface
• Accommodate SNIP space to space Ka-band frequency
  plan for both 225 MHz wide channel and the 650
  MHz wide channel
• Space Network Ka-band Development Plan
• Fiscal Year 2003
• Complete system requirements
• Complete Ops Concept
• Complete System Spec
• Fiscal Years 2004-2005
• Hardware Development and testing
• Demonstrations
• Fiscal Year 2006
• Establish Ka-band user services capability

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ADVANTAGES OF SN SUPPORT SERVICES

• SPACE-BORNE PLATFORM
• READY ASSET
• GLOBAL COVERAGE
• QUICK DROP LOCK REACQ TIME
• REDUNDANT PATHS (GROUND)
• LOW MAINTENANCE OPERATIONS COST

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Ground Network
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(No Transcript)
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Wallops Ground Station (WGS)

• The primary antenna systems of the Wallops Ground
  Station (WGS) consist of three highly automated
  tracking systems. These systems provide support
  to low earth orbiting satellites. These include
  the 5-meter Low Earth Orbiter-Terminal (LEO-T),
  the 8-meter Transportable Orbital Tracking System
  (TOTS), and the 11.3-meter X- and S-Band tracking
  system.
• The WGS provides an electronic interface between
  a spacecraft and a science user 24 hours per day,
  365 days per year. The 11.3-meter antenna system
  is shown in the foreground of the picture to the
  right.
• Telemetry data is delivered in real-time or near
  real-time. For high data rate S-Band projects (gt
  10 Mbps) digital cassette tapes are available at
  a greatly reduced cost when compared to the
  dedicated circuit costs. Post pass playback of
  high rate recorded data can be scheduled. User
  generated commands are delivered to the
  spacecraft in throughput fashion and the 5-meter
  system can accept store-and-forward type
  commands.
• Other tracking antenna systems used in support of
  low earth orbiting spacecraft at the WGS include
  7.3-meter L- and S-band antennas, various UHF
  arrays and an automated UHF yagi array providing
  support to the space station MIR.

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AGS, Poker Flat Research Range, Chatanika, Alaska

• The Alaska Ground Station (AGS) consists of two
  automated tracking systems. These systems are a
  5-meter Low Earth Orbiter-Terminal (LEO-T and an
  11.3-meter X- and S-Band tracking system. An
  8-meter Transportable Orbital Tracking System
  (TOTS) is prime for sounding rocket support but
  is available on a non-interference basis during
  high activity periods such as launch and early
  orbit operations. The station is located
  approximately 30 miles northeast of Fairbanks,
  Alaska. The station provides a beneficial
  tracking location for polar earth orbiting
  satellites due to its high latitude.

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McMurdo Ground Station (MGS)

• The McMurdo Ground Station (MGS) consists of an
  automated 10-meter tracking system. The station
  is located at McMurdo Station, Antarctica. The
  station provides a beneficial tracking location
  for polar orbiting satellites due to its high
  latitude. The primary functions of the station
  are the tracking and data acquisition of the
  Synthetic Aperture Radar (SAR) satellite systems,
  tracking and data acquisition of polar orbiting
  S-Band missions, and launch vehicle/payload
  tracking during launch and early orbit periods of
  high inclination missions. The station also
  includes the NASA Tracking and Data Relay System
  (TDRS) communications system.
• Telemetry data can be delivered in real-time or
  near real-time using either the McMurdo TDRS
  Relay System (MTRS) or via a low-rate circuit.
  For high data rate S-Band projects (gt 10 Mbps)
  digital cassette tapes are available at a greatly
  reduced cost when compared to the communication
  circuit costs and can be air shipped to the user
  when shipping is available from the station. Post
  pass playback of high rate recorded data can be
  scheduled.

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Svalbard Ground Station (SGS)

• The Svalbard Ground Station (SGS) consists of an
  automated 11.3-meter tracking system. The station
  is located near the town of Longyearbyen on the
  Svalbard archipelago in Norway. Svalbard is
  located north-northeast of the main Norwegian
  land area. The station provides a beneficial
  tracking location for polar orbiting satellites
  due to its high latitude. The primary function of
  the station is tracking and data acquisition of
  the Earth Observing System (EOS) satellite
  missions.
• Telemetry data can be delivered in real-time or
  near real-time using dedicated communications
  circuits back to NASAs Goddard Space Flight
  Center. For high data rate S-Band projects (gt 10
  Mbps) digital cassette tapes are available at a
  greatly reduced cost when compared to the
  dedicated circuit costs and can be air shipped to
  the user. Post pass playback of recorded data can
  be scheduled.

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Mission Operations Support ContractConsolidated
Space Operations Contract (CSOC)
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SCDS/CSOC Capabilities

• Concept Definition (Phase A/B)Operations
  Concept Communications Architecture Mission
  Services Science Processing Concept Space
  Network/Ground Network(SN/GN) Utilization
  Analysis Flight Dynamics Concept Cost Benefit
  Analysis Cost Estimates Mission Life-Cycle
  Support Scenarios Risk Identification
  Mitigation Plan Information Security Plan
  Facility Requirements and Trade Studies
• Design Development (Phase B/C/D)- Mission
  Documentation Design Flight Reviews Develop
  Deploy Mission, Communications SN/GN
  Systems/Assets SN/GN Loading Analysis Risk
  Management IntegrationTest(IT) Program
  Support and Facility Preparation- Pre-Launch
  Test Support Launch Site Support LaunchEarly
  Operations(LEO) Support (including ranging
  tracking, GPS Validation, Flight Dynamics, as
  appropriate)- Flight Operations Team(FOT)
  Training Certification Ops Procedures
  Development Verification Mission Database
  development and IT Operations
• Flight Operations (Phase E) Flight Control
  Operations Mission/Science Planning Flight
  Dynamics Contingency Operations and Science
  Processing
• Extended Flight Operations (Phase E)Transition
  to Extended Mission Mode (e.g. reduced support
  /or contacts, transfer to university)
• Commercial Service ProvidersIdentify, acquire
  manage commercial service providers as required
  to augment NASA resources
• Customer Support ServiceTrade Studies, SCDS/CSOC
  Support Coordination, Management of SN/GN
  Commercial provider GN Assets Services As
  Required

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SCDS/CSOC Benefits

• Depth of Resources provides right sizing during
  entire mission life Extensive experienced CSOC
  personnel base available for assignment at the
  right time. Multiple CSOC projects provide
  ability to efficiently manage personnel base.
• Breadth of Resources tailored for your
  programCSOC personnel experience base includes
  the entire scope of mission requirements (e.g.
  R/F, SW, HW, FOT, IT, specialty engineering,
  subject matter experts). Personnel with relevant
  experience are assigned, thereby reducing
  technical risk to project and reducing cost
  through minimal learning curve activity.
• Range of Resources provides optimal mission
  solutionNASA, non-NASA, commercial and custom
  capabilities will be selected and configured to
  provide the best solution.
• Certified Redundancy Contingency Capabilities
  are available throughout mission lifeAlternate
  ground stations can be used to provide a robust
  backup capability (redundancy) in the event of HW
  failure, communications outage, etc. During
  critical mission activities (e.g. LEO,maneuvers,
  s/c anomalies), additional ground stations can be
  assigned to meet mission objectives
  (contingency).
• On-Going Technology Refreshment Upgrade program
  alleviates obsolescenceIn partnership with GSFC,
  new technologies capabilities, upgrades and
  replacements are evaluated for application on a
  project by project basis. Cost/benefit analysis
  for NASA and Project is performed.
• System Support Maintenance is pooled shared
  by multiple programs
• Range of Mission Operations Concepts are
  available Included are dedicated shared FOTs
  at/near GSFC and dedicated remote FOTs (at
  customer facility).

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RESOURCES

• WDISC WEBSITE (SYSTEM INTERFACE AND REQUIREMENT
  DOCUMENTS ARE FOUND HERE)
• http//msp.gsfc.nasa.gov/wdisc/
• SPACE NETWORK ONLINE INFORMATION CENTER (DETAILED
  TRACKING AND DATA RELAY SATELLITE SYSTEM
  INFORMATION INCLUDING A LINK TO THE SN USER GUIDE
  REV. 7 (REV 8 COMING SOON))

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BACKUP
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Wallops Ground Station S-band Receive
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Wallops Ground Station S-Band Transmit
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Wallops Ground Station X-Band Receive
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Alaska Ground Station S-band Receive
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Alaska Ground Station S-Band Transmit
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Alaska Ground Station X-Band Receive
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McMurdo Ground Station S-band Receive
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McMurdo Ground Station S-band Transmit
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McMurdo X-Band Receive
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Svalbard Ground Station S-band Receive
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Svalbard Ground Station S-band Transmit
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Svalbard X-Band Receive