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Frequently Asked Questions

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1. Who needs a GIPSY license?

  • All users of GIPSY are required to operate with an active GIPSY license.
  • A separate license is typically required for each research group, including different research groups with the same institution or company.
  • Users are advised to apply for a license renewal at least 3 months before the current license expires.

2. How do I request a copy of the GIPSY-OASIS software?

  • Research and education users should submit a license request from the Software page.
  • For commerical and government-use license requests please contact David Murphy.

3. What is the processing time for a GIPSY license application?

  • The typical processing time for a GIPSY license application is 6 weeks, but users are advised to allow at least 3 months.

4. What is the most recent version of GIPSY?

  • Version 6.3 was released on March 26, 2014.

5. On what platforms does GIPSY run?

  • GIPSY has been developed and tested on Red Hat Enterprise Linux release 4 (RHEL4) 32-bit and release 5 (RHEL5) 64-bit operating systems.
  • It has been successfully installed and run on other versions of Linux such as various versions of Fedora and Ubuntu. Users do this at their own risk, as additional platforms are not officially supported.
  • GIPSY version 6.3 is available with either 32-bit or 64-bit executables.

6. What are the memory requirements for GIPSY?

  • GIPSY 6.3 requires computers with 2GB of memory. Future versions are likely to require 4GB of memory.

7. Where can I find documentation on GIPSY?

  • GIPSY documentation is provided with the software through man and help pages accompanying each software module.
  • Documentation and training materials are also available on the Documentation page.

8. Is GIPSY training available?

  • A GIPSY user group and class is usually held at least once a year, typically coinciding with the Fall AGU meeting in San Francisco, CA.
  • On-line training through videos and material from prior classes is also available on the Documentation page.
  • Material from prior GIPSY classes are provided in each GIPSY release (see class_gd2p directory).

9. How do I log into the GIPSY documentation area?

  • The login for the documentation area is the same as for the GIPSY Forum (see next FAQ).
  • Note that it can take up to a few hours for forum logins to transfer to the documentation area.

10. Is there an online forum where GIPSY questions and support is provided?

  • There is a GIPSY user forum available here.
  • The GIPSY Forum is a place for the licensed GIPSY user community to share their experiences with each other, and to assist each other with GIPSY usage.
  • The GIPSY Forum is moderated by members of the GIPSY development team.
  • A valid GIPSY license point of contact is required to register for GIPSY Forum access.

11. What types of positioning applications are possible with GIPSY?

Using a single user interface (, GIPSY can perform:
  1. Static point positioning of a terrestrial station.
  2. Kinematic point positioning of terrestrial station.
  3. Kinematic point positioning of airplanes.
  4. Precise orbit determination of individual and constellations of Earth orbiting satellites.
  5. Processing of GPS and GLONASS data.
  6. Single receiver ambiguity resolved point-positioning (static, kinematic or orbit determination), using JPL's orbit and clock products (See the Data Products page). For example, "Single receiver phase ambiguity resolution with GPS data", 2010, Bertiger et al., J. Geodesy, Volume 84, Number 5, 327-337, DOI: 10.1007/s00190-010-0371-9.

12. What types of orbit and clock products for GNSS constellations are required by GIPSY?

  • Internal GIPSY-specific orbit and clock products are used for all GIPSY processing.
  • GIPSY provides modules to convert IGS product formats into GIPSY formats.

13. Where do I find JPL's orbit and clock solutions for the GPS constellation?

  • JPL's orbit and clock solutions for the GPS constellation are available in GIPSY native format and IGS format. Please refer to the Data Products page for data locations.

14. What is the latency of JPL's orbit and clock solutions for the GPS constellation?

Three types of products are available:
  1. Ultra-Rapid solutions are available with a latency of <2 hours after the last available measurement.
  2. Rapid solutions are available with a latency of 14 hours after the end of a day.
  3. Final solutions are available with a latency of approximately 10 days.
See data products for more information.

15. Does JPL provide GLONASS orbit and clock products?

  • JPL does not currently release ultra-rapid, rapid or final orbit and clock products for the GLONASS constellation.
  • These products are expected to be available in 2014.

16. Is there an automatic GIPSY-based GPS positioning service?