Home

GIPSY-OASIS Software

Real-Time GIPSY Software

Products and Services

Accomplishments

Resources and References

Related Links

Contact Us




GPS-Inferred Positioning SYstem and Orbit Analysis SImulation Software
 
General satellite orbit analysis software
  • Cm-level accuracy demonstrated (ground and space)

  • Automated, unattended low cost operations

  • Innovative GPS and non-GPS analysis capabilities

  • Real-time capability (with RTG - Real-Time GIPSY)
 
Users: hundreds of licensed users in 50+ organizations
 
Innovation
  • Automated - fast - ultra-precise - strict data quality control
  • Unique filter/smoother is without equal in GPS estimation capabilities and accuracy
  • Adaptable to: non-GPS orbiters; non-NASA programs (FAA, military, commercial)
 
Usability
  • Training courses available
  • Software easily ported to widely used unix workstations
  • Documentation includes user guides, on-line help, and mathematical descriptions
 
Science and Engineering Innovations:
What you can do with GOA II
  • Orbit determination - individual spacecraft or satellite constellations
  • GPS and non-GPS spacecraft
  • Precise positioning and timing: ground, sea, and air
  • Sophisticated filter/smoother
  • Automated (unattended) operations
  • Near-real time capability
  • Real-time capability with RTG
  • NASA, military, commercial
  • Future system design
    • Advanced error evaluation
    • Simulations
  • General observable models
    • Transmitters or receivers can be on ground or on spacecraft
    • doppler, phase, range, angles
GOA II: Special and Unique Features
  • Ultra-high accuracy and low-cost routine automated processing
  • Models - complete, comprehensive, can be s/c tailored
    • State-of-the-art force modeling: Earth/Sun/Moon/planets (and tidal) gravity perturbations, solar pressure, thermal radiation, drag, empirical models etc.
    • Geometric: Earth orientation, tides, ocean/atmosphere loading, general relativity, crustal plate motion, GPS yaw model, phase windup etc.
  • Filter/smoother estimator
    • Intelligently identifies, corrects or excludes questionable data
    • Automated, efficient, fast operation: uses matrix factorization for rock-solid stability
    • Sophisticated and flexible process noise modeling
    • General estimator used for GPS and non-GPS satellite data
  • Caltech has filed for patents with the U.S. Patent Office

Fully Automated Data Analysis with GIPSY-Oasis II

GIPSY-OASIS II: Quality
  • 1995 nominee for NASA Software of the Year; received Space Act Award
  • At least 15 NASA Tech Briefs attributed to GOA II
  • 3 NASA Group Achievement Awards
  • Best Paper Awards attributed to GOA II
    • IEEE Position Location and Navigation Symposium (2 recent awards)
    • Institute of Navigation (7 recent awards)

GIPSY-OASIS and RTG Applications

1. Automated GPS processing
(space and ground-based)

2. Direct GPS Tracking onboard

3. Differential GPS
(including WADGPS)
  

 
(To top of page)