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PPP Systems: Difference between revisions
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On January 2023, the [[Galileo_High_Accuracy_Service_(HAS)|Galileo High Accuracy Service (HAS)]] was released as Initial Service. The Galileo HAS provides free of charge access, through the Galileo signal (E6-B) and by terrestrial means (Internet), to the information required to estimate an accurate positioning solution using a Precise Point Positioning algorithm in real-time. | On January 2023, the [[Galileo_High_Accuracy_Service_(HAS)|Galileo High Accuracy Service (HAS)]] was released as Initial Service. The Galileo HAS provides free of charge access, through the Galileo signal (E6-B) and by terrestrial means (Internet), to the information required to estimate an accurate positioning solution using a Precise Point Positioning algorithm in real-time. | ||
==PPP Software | ==PPP Software Online Services== | ||
Several software products implementing a PPP processing strategy have been developed by government agencies, universities, industries and individuals, some of them are available as online services. PPP SW require the availability of precise reference satellite orbit and clock products, normally computed using a network of GNSS reference stations distributed worldwide. The [http://www.igs.org/ International GNSS Service (IGS)] uses its [https://network.igs.org/ global network] to compute orbit and clock products used by several of the PPP providers. | Several software products implementing a PPP processing strategy have been developed by government agencies, universities, industries and individuals, some of them are available as online services. PPP SW require the availability of precise reference satellite orbit and clock products, normally computed using a network of GNSS reference stations distributed worldwide. The [http://www.igs.org/ International GNSS Service (IGS)] uses its [https://network.igs.org/ global network] to compute orbit and clock products used by several of the PPP providers. | ||
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* [https://webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/ppp-info.php?locale=en NRCan PPP]: provides post-processed position estimates from GPS observation files submitted by the user in RINEX format. Precise position estimates are referred to the CSRS standard North American Datum of 1983 (NAD83) as well as the International Terrestrial Reference Frame (ITRF). Single station position estimates are computed for users operating in static or kinematic modes using precise GPS orbits and clocks from IGS global data centers. | * [https://webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/ppp-info.php?locale=en NRCan PPP]: provides post-processed position estimates from GPS observation files submitted by the user in RINEX format. Precise position estimates are referred to the CSRS standard North American Datum of 1983 (NAD83) as well as the International Terrestrial Reference Frame (ITRF). Single station position estimates are computed for users operating in static or kinematic modes using precise GPS orbits and clocks from IGS global data centers. | ||
==Notes== | ==Notes== | ||
Latest revision as of 07:01, 28 August 2026
| Fundamentals | |
|---|---|
| Title | PPP Systems |
| Edited by | GMV |
| Level | Basic |
| Year of Publication | 2011 |
Precise point positioning (PPP) stands out as an optimal approach for providing centimeter-level error positioning using current and coming GNSS constellations. The Precise Point Positioning (PPP) processes measurements from a single user receiver, using detailed physical models and corrections, and precise GNSS orbit and clock products computed beforehand. PPP differs from other precise-positioning approaches like Real Time Kinematics (RTK) in that no reference stations are needed in the vicinity of the user. Another advantage is that since the GNSS orbit and clock products are by nature global, the PPP solutions are also global. However, it should be noted that it is possible to set up a regional PPP service using a regional network of stations.[1]
Galileo High Accuracy Service (HAS)
On January 2023, the Galileo High Accuracy Service (HAS) was released as Initial Service. The Galileo HAS provides free of charge access, through the Galileo signal (E6-B) and by terrestrial means (Internet), to the information required to estimate an accurate positioning solution using a Precise Point Positioning algorithm in real-time.
PPP Software Online Services
Several software products implementing a PPP processing strategy have been developed by government agencies, universities, industries and individuals, some of them are available as online services. PPP SW require the availability of precise reference satellite orbit and clock products, normally computed using a network of GNSS reference stations distributed worldwide. The International GNSS Service (IGS) uses its global network to compute orbit and clock products used by several of the PPP providers.
There are free online PPP services. When submitting RINEX observation files on each website, the data will be processed by those services and then the PPP solution is obtained and sent back.
- gLAB Software: ESA/UPC GNSS-Lab Tool suite (gLAB) is an interactive software package for GNSS data processing and analysis, including Precise Positioning. gLAB Software is available at https://gssc.esa.int/portal/datalabs upon registration at ESA GSSC Now.
- magicPPP: processing static and kinematic GNSS real-time data in RINEX format. Real-time orbits and clocks needed by PPP are generated internally (magicODTS). Rapid and final GPS orbits and clocks from IGS are also used, if available. MagicPPP Software is available upon registration
- NRCan PPP: provides post-processed position estimates from GPS observation files submitted by the user in RINEX format. Precise position estimates are referred to the CSRS standard North American Datum of 1983 (NAD83) as well as the International Terrestrial Reference Frame (ITRF). Single station position estimates are computed for users operating in static or kinematic modes using precise GPS orbits and clocks from IGS global data centers.
Notes
References
- ^ M.D. Laínez Samper et al, Multisystem real time precise-point-positioning, Coordinates, Volume VII, Issue 2, February 2011