Title:
GENERATING HIGH PRECISION IONOSPHERIC GROUND-TRUTH MEASUREMENTS
Document Type and Number:
WIPO Patent Application WO2006073490
Kind Code:
A3
Abstract:
A method, apparatus and article of manufacture provide ionospheric groundÂtruth measurements for use in a wide-area augmentation system (WAAS). Ionospheric pseudorange/code and carrier phase data as primary observables is received by a WAAS receiver. A polynomial fit is performed on the phase data that is examined to identify any cycle slips in the phase data. The phase data is then leveled. Satellite and receiver biases are obtained and applied to the leveled phase data to obtain unbiased phase-leveled ionospheric measurements that are used in a WAAS system. In addition, one of several measurements may be selected and data is output that provides information on the quality of the measurements that are used to determine corrective messages as part of the WAAS system.
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Inventors:
KOMJATHY ATTILA (US)
SPARKS LAWRENCE (US)
MANNUCCI ANTHONY J (US)
SPARKS LAWRENCE (US)
MANNUCCI ANTHONY J (US)
Application Number:
PCT/US2005/026012
Publication Date:
October 19, 2006
Filing Date:
July 22, 2005
Export Citation:
Assignee:
CALIFORNIA INST OF TECHN (US)
KOMJATHY ATTILA (US)
SPARKS LAWRENCE (US)
MANNUCCI ANTHONY J (US)
KOMJATHY ATTILA (US)
SPARKS LAWRENCE (US)
MANNUCCI ANTHONY J (US)
International Classes:
G01S1/04; G01S19/04; G01S19/07; G01S19/11; G01S19/48
Other References:
KOMJATHY ATTILA ET AL: "On the Ionospheric Impact of Recent Storm Events on Satellite-Based Augmentation Systems in Middle and Low-Latitude Sectors", PROC. ION GPS/GNSS 2003, PORTLAND, OR, USA, 9 September 2003 (2003-09-09), pages 2769 - 2776, XP002385758
FRAILE-ORDONEZ JOSE: "Real-time TEC determination for ionospheric modeling in WADGPS", PROC ION GPS; PROCEEDINGS OF ION GPS 1995 INST OF NAVIGATION, ALEXANDRIA, VA, USA, vol. 2, 1995, pages 1193 - 1197, XP002385759
SMITH D A: "Computing unambiguous TEC and ionospheric delays using only carrier phase data from NOAA's CORS network", POSITION LOCATION AND NAVIGATION SYMPOSIUM, 2004. PLANS 2004 MONTEREY, CA, USA 26-29 APRIL 2004, PISCATAWAY, NJ, USA,IEEE, US, 26 April 2004 (2004-04-26), pages 527 - 537, XP010768917, ISBN: 0-7803-8416-4
KOMJATHY ATTILA ET AL: "The ionospheric impact of the October 2003 storm event on WAAS", PROC. INT. TECH. MEET. SATELL. DIV. INST. NAVIG. ION GNSS; PROCEEDINGS OF THE 17TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INSTITUTE OF NAVIGATION, ION GNSS 2004; PROCEEDINGS OF THE 17TH INTERNATIONAL TECHNICAL MEETING OF THE, 2004, pages 1298 - 1307, XP002385760
FRAILE-ORDONEZ JOSE: "Real-time TEC determination for ionospheric modeling in WADGPS", PROC ION GPS; PROCEEDINGS OF ION GPS 1995 INST OF NAVIGATION, ALEXANDRIA, VA, USA, vol. 2, 1995, pages 1193 - 1197, XP002385759
SMITH D A: "Computing unambiguous TEC and ionospheric delays using only carrier phase data from NOAA's CORS network", POSITION LOCATION AND NAVIGATION SYMPOSIUM, 2004. PLANS 2004 MONTEREY, CA, USA 26-29 APRIL 2004, PISCATAWAY, NJ, USA,IEEE, US, 26 April 2004 (2004-04-26), pages 527 - 537, XP010768917, ISBN: 0-7803-8416-4
KOMJATHY ATTILA ET AL: "The ionospheric impact of the October 2003 storm event on WAAS", PROC. INT. TECH. MEET. SATELL. DIV. INST. NAVIG. ION GNSS; PROCEEDINGS OF THE 17TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INSTITUTE OF NAVIGATION, ION GNSS 2004; PROCEEDINGS OF THE 17TH INTERNATIONAL TECHNICAL MEETING OF THE, 2004, pages 1298 - 1307, XP002385760
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