• Corpus ID: 9284915


  author={Jan Kouba},
Since 1994, the International GNSS Service (IGS) ha s provided precise GPS orbit products to the scient ific community with increased precision and timeliness. Many national geodetic agencies and GPS users interested in geodetic positioning have adopted the IGS precise orbits to achieve centimeter level acc uracy and ensure long-term reference frame stability. Rel ative positioning approaches that require the combination of observations from a minimum of two GPS receivers, with at least one… 
Analysis and improvement of the Bancroft algorithm for GNSS satellite orbit determination
Satellite orbit information is crucial for ensuring that global navigation satellite systems (GNSSs) provide appropriate positioning, navigation and timing services. Typically, users can obtain
Uncovering common misconceptions in GNSS Precise Point Positioning and its future prospect
An overview of the current performance of PPP is provided as well as attempt to address some of the common misconceptions of this positioning technique—considered by many as the future of satellite positioning and navigation.
An assessment of the precise products on static precise point positioning using multi-constellation GNSS
The aim of this paper is to assess the achievable static positioning accuracy and precision when using different precise ephemerides from three analysis centres Natural Resources Canada, European Space Agency and GeoForschungsZentrum, using GPS alone, GLONASS alone, and GPS and GLonASS combined.
MULTI-GNSS PPP: An Alternative Positioning Technique for Establishing Ground Control Points
Investigation of the usability of PPP in establishing GCPs for aerial triangulation indicates that 5 cm or better horizontal and vertical positioning accuracy can be achieved by multi-GNSS PPP process within approximately 30 minutes using high-frequency GNSS receivers.
An Assessment of GPS-based precise point positioning of the low earth-orbiting satellite CHAMP
Precise point positioning (PPP) with the international GNSS service (IGS) products, which consist of precise orbits and clock correction information, has been demonstrated by several investigators to
Multi-GNSS Hybridization for precise positioning
The CNES/CLS IGS AC that has announced the delivery of weekly Galileo precise orbits, clocks and Wide-Lane satellite biases is used and a new method is introduced on how to compare ambiguity resolution results for a common overlapping period.
Precise Point Positioning
This chapter introduces the PPP concept and specifies the required models needed to correct for systematic effects causing centimeter-level variations in the satellite-to-user range, including the solution of station tropospheric zenith path delays and receiver clocks, with millimeter and nanosecond precision respectively.
Zero-difference GPS ambiguity resolution at CNES–CLS IGS Analysis Center
The theoretical background, the strategies and the models used to compute the products that are submitted weekly to the IGS, and the two-step, ambiguity-fixing scheme (wide-lane and narrow-lane) is described in detail.
Performance of precise point positioning using current triple-frequency GPS measurements in Australia
The results indicate that the use of triple-frequency GPS measurements improves the 3D positioning accuracies as well as shortens solution convergence times compared to dual-frequency PPP.
Un-differenced precise point positioning model using triple GNSS constellations
Abstract This paper introduces a dual-frequency precise point positioning (PPP) model, which combines the observations of three different global navigation satellite system (GNSS) constellations,


GPS Precise Point Positioning Using IGS Orbit Products
Combining the orbits of the IGS Analysis Centers
Currently seven Analysis Centers of the International GPS Service for Geodynamics (IGS) are producing daily precise orbits and the corresponding Earth Orientation Parameters (EOP). These individual
Precise point positioning for the efficient and robust analysis of GPS data from large networks
This work determines precise GPS satellite positions and clock corrections from a globally distributed network of GPS receivers, and analysis of data from hundreds to thousands of sites every day with 40-Mflop computers yields results comparable in quality to the simultaneous analysis of all data.
Developing an IGS time scale
A new filter package written to automate the production of an integrated IGS frequency scale based on a dynamically weighted ensemble of the included frequency standards is shown.
A Discussion of IGS Solutions and Their Impact on Geodetic and Geophysical Applications
The generation and efficient application of IGS products and their impact on a number of positioning and atmospheric applications, including low earth orbit satellites, is reviewed and discussed.
Sub-Daily Earth Rotation Parameters and the International GPS Service Orbit/Clock Solution Products
PP via precise station position solutions with the IGS orbit/clock combined products, provides an ideal interface to access the I GS realization of ITRF, but it is important that the same convention be used with respect to sub-daily ERP.
GPS Meteorology: Remote Sensing of Atmospheric Water Vapor Using the Global Positioning System
We present a new approach to remote sensing of water vapor based on the global positioning system (GPS). Geodesists and geophysicists have devised methods for estimating the extent to which signals
Assessment of GPS carrier-phase stability for time-transfer applications
GPS carrier phase and TWSTT systems have a frequency uncertainty of 2.5 and 5.5 parts in 10/sup 15/, respectively for averaging times of a day, apart from an overall constant time offset.
Relativistic Time Transformations in GPS
Since Selective Availability was permanently switched off on 7 May 2000, most of the GPS satellite clocks have been well behaved. During a 24-h period precise satellite clock solutions, corrected for