ROCSat3 COSMIC GPS

1

• ROCSat-3 / COSMIC GPS
• JPL Project Overview
• Allen H. Farrington - Earth Science Flight GPS
  Receiver Office
• March 2003

2
Overview

• COSMIC Constellation Observing System for
• Meteorology, Ionosphere and Climate
• Joint US - ROC (Taiwan) Project
• Scientific Foundation Based On JPL / Stanford
  Radio Occultation Techniques
• Limb Sounding Of The Earths Atmosphere Using GPS
  As Transmitters
• COSMIC consists of
• Six Spacecraft, Each With Three Instruments
• GPS Receiver / Tiny Ionospheric Photometer /
  Tri-Band Beacon
• MOS In Taiwan
• Data Analysis Archive Center In Boulder, CO
• IGS - GPS Ground Fiducial Network
• Data Freely Available To Scientific Community In
  Near Real-Time

3
GPS As The Prime Mission

• Six-Spacecraft Constellation
• Launch Scheduled For Sept 2005 - 1Yr Orbit
  Raising
• NSPO (Taiwan) / NSF / NOAA / NASA Providing Funds
• Orbital / ROC Vendors / UCAR / BRE / JPL
  Implementing
• Orbit 60 (3 Planes) / 700-800 km

COSMIC
Radiosonde
Global Daily Coverage Typical Retrieved Profile
POD Antenna (x2)
GPS/PC/SSR Combined
Progressively More Capability
Limb Occultation Antenna (x2)
COSMIC 2005-2010
4
Key Players Their Roles

• NSPO Mission Owner Program Management
• Five Taiwanese companies are expected to
  benefit from the program. Technologies will be
  transferred to these companies for the production
  of 14 spacecraft components. National Space
  Program Office director Lee Lou-chuang said that
  the office was ambitious to play a leading role
  in future international collaborative projects,
  which would involve more countries, including
  European nations and Japan. Lee said that the
  space program office was planning to build as
  many as 50 constellation satellites to carry out
  weather-related scientific research.Taipei
  Times, May, 2001.
• UCAR Science Lead Institution / Payload Program
  Management
• Launch Services Lead
• NSF Represents US Governments Interests
  (including NASAs)
• Orbital Spacecraft Prime Contractor To NSPO
• Orbital will be responsible for constellation
  design and analysis, development of the
  spacecraft bus, payload instrument development
  and oversight of components made by Taiwan local
  vendors. Orbital will also provide assistance
  with system integration, satellite integration
  and testing in Taiwan, early in-orbit checkout,
  satellite positioning and mission operations. The
  project builds on the Orbital-built and launched
  OrbView-1 satellite, which was deployed in 1995
  and still operates today.
• NRL Tri-Band Beacon Tiny Ionospheric
  Photometer Provider
• BRE GPS, Payload Controller (PC) Solid-State
  Recorder (SSR) Provider
• JPL Owner Of GPS Receiver Intellectual Property,
  GPS Techniques Expert

5
Many Players / Complex Relationships
Total Mission Cost 100M USAF/NOAA/NSF
Contribute 17M
NSPO (80M)
NSF
NASA (3M) Code Y
500K
MOA
2.5M
Orbital Spacecraft
UCAR Science
UCAR Launch Services
UCAR Payloads
USAF RSLP
USN Ground Terminals
BRE Consulting
NRL TIP / TBB
Orbital Minotaur
TRW Eng. Services
BRE GPS / SSR / PC
6
Mission Schedule Overview
2003
2004
2005
2002
FY
2002
2003
2004
2005
CY
Work Start
P/L PDR
S/C PDR
P/L CDR
S/C CDR
FM1
FM2-6
Launch
GPS Development
UCAR/ BRE
Design Transfer Activities
JPL
Evaluation Test Activities
JPL
S/C 1 ATLO (US)
Orbital
S/C 2-6 ATLO (Taiwan)
Orbital

• BRE Deliveries Lead JPL Activities
• UCAR Managing BRE Hardware Deliverables
• UCAR Coordinates Weekly With JPL
• JPL Activities Are Tied To BRE Deliverables
  Slide With Them If Slips Occur

Broad Reach Engineering Breadboard
Integrated GPS / SSR / Payload Controller (PC)
7
JPL Future Activities

• Program Management
• Coordinate Schedules Deliveries With BRE UCAR
• JPL Has To Make Adjustments To Our Activities As
  Schedule Slips Occur
• Systems Engineering
• Continue Development Of Test/Validation
  Plans/Procedures
• Assist BRE Orbital In S/C Accommodation Items
  (Antennas)
• Design Transfer Activities
• Prototype New Reference Oscillator For BRE
• Assist In Debug / Evaluation Of BRE Breadboards
  (Digital RF)
• Software Activities
• Develop New Occultation Capabilities, Test On
  SAC-C
• Baseline Test Software And Prepare For EM
  Delivery
• Prepare and Baseline Flight Software Based On
  CHAMP Deliveries
• Validation Activities
• Evaluate Performance Of Engineering Model
• Evaluate Long-Term (1000 hr) Performance of FMs
  Prior To Delivery To Orbital
• Approve Flight Units For Use On COSMIC

8
BRE Has Delivered Excellent Technical Quality In
The Breadboard
Breadboard Digital Section (BRE)
Power Supply / Clock / RF Front-End (JPL-Provided
Until RF Breadboard Delivered)
9
Acronyms References

• COSMIC Web Site
• http//www.cosmic.ucar.edu

• ROC - Republic of China (Taiwan)
• NSPO - National Space Program Office (Taiwan)
• http//www.nspo.gov.tw
• NSF - National Science Foundation
• http//www.nsf.gov
• UCAR - University Corporation for Atmospheric
  Research
• http//www.ucar.edu
• USAF - United States Air Force
• http//www.af.mil
• USN - United Space Network
• http//www.uspacenet.com
• BRE - Broad Reach Engineering
• http//www.broadreachengineering.com
• NRL - Naval Research Laboratory
• http//www.nrl.navy.mil
• NMO - NASA Management Office (at JPL)

• RSLP - Rocket Systems Launch Program (USAF)
• POD - Precise Orbit Determination
• GPS - Global Positioning System
• PC - Payload Controller
• SSR - Solid State Recorder
• TIP - Tiny Ionospheric Photorimeter
• TBB - Tri-Band Beacon
• EM - Engineering Model
• QM - QualSat Model (FM1)
• FM - Flight Model (FM2-6)