SEARCH · Search NASA

Results for “WADGPS”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

10 records

All sources NASA NTRS DOE OSTI

NASA NTRS1996

A Prototype WADGPS System for Real Time Sub-Meter Positioning Worldwide

Many planned and proposed NASA science activities will benefit from precise real time positioning with wide area differential GPS (WADGPS). Future NASA users include orbital remote sensing instruments (altimeters, SARs, imagers) and a variety of airborne and Earth based investigations. Real time positioning requirements and goals range from a few meters to a few centimeters. Direct benefits will include the enabling of missions that are not now possible (such as precision remote sensing from the space shuttle and space station) and dramatic reduction of analysis costs for a diversity of current investigations.

GPS↗

NASA NTRS1999

Flight Test Demonstrate Sub 50 cms RMS Vertical WADGPS Positioning

Wide Area Diffential GPS (WADGPS) positioning is performed in real-time during NASA's DC-8 AirSAR flights.

GPS Flight Test↗

NASA NTRS1997

Orbit and Troposphere Results of a Real-Time Prototype WADGPS System

Implementation and results of a real-time GPS orbit correction process for WADGPS is presented.

SATLOC↗

NASA NTRS1997

Orbit and Troposphere Results of a Real-Time Prototype WADGPS System

UNKNOWN

WADGPS↗

NASA NTRS1998

A Close Look at Satloc's Real-Time WADGPS System

The network was extensively tested for six months before Satloc began offering differential service to commercial users. During the 11 months that commercial service has been available we have gathered additional data to confirm the operating performance.

real-time GPS differential services differential c↗

NASA NTRS2002

A new ionospheric model for wide area differential GPS: the multi-shell approach

In this paper we report on recent developments we made concerning a WADGPS ionospheric model. The new model is a simple extension of the currently used single- shell ionospheric model.

GPS WADGPS total electron content ionosphere valid↗

NASA NTRS1997

A Prototype Real-Time Area Differential GPS System

In this paper we describe the system architecture, algorithms, and preliminary results from an operating prototype Wide Area Differential GPS (WADGPS) system spanning the continetal US (CONUS).

Prototype Wide Area↗

NASA NTRS2002

A new ionospheric model for wide area differential GPS: the multiple shell approach

Explore the source record for details and available documents.

GPS WADGPS total electron content ionosphere valid↗

NASA NTRS2000

An Internet-based Global Differential GPS System, Initial Results

Using a network of 15 global GPS receivers, GPS data is returning to JPL via the open Internet to determine the orbits and clocks of the GPS constellation in real-time.

GPS↗

NASA NTRS1999

Determining The Uncertainty of Ionospheric Corrections For Users In Wide Area Augmentation Systems

Broadcast messages of the FAA's Wide Area Augmentation System (WAAS) include the grid ionosphere vertical error (GIVE).

GPS↗