Results 261 to 270 of about 63,794 (294)

LEO Doppler-aided GNSS position estimation

GPS Solutions, 2021
Muyuan Jiang, Honglei Qin, Chao Zhao, Guiyu Sun   +3 more
openaire   +1 more source

GPS Doppler Processing for Precise Positioning in Dynamic Applications

Navigation, 1985
A doppler processing technique for smoothing the GPS code-phase measurements is presented. It is shown that this technique can enhance the resolution of C/A pseudo-range measurements to better than 1 centimeter. Data is presented to show that it is possible to obtain position fixes with an runs scatter of a few centimeters from the C/A code.
openaire   +1 more source

Doppler Satellite Positioning, Telemetry and Data Systems

2015
Before we consider the GPS system and its international equivalents, there are still two operational satellite systems that rely on the Doppler technique originally developed for Transit. These are the Argos environmental data system and the Cospas-Sarsat satellite search and rescue system.
openaire   +1 more source

Triatomic Hydrogen and Doppler Effect in Hydrogen Positive Rays

Nature, 1947
J. J. THOMSON1 discovered the triatomic molecule of hydrogen by the positive ray parabolic method. It was later confirmed by Dempster2, Duane and Wendt3, and several others. Its occurrence is very frequently noted in discharge tubes, but the optimum conditions are not well defined. While investigating the Doppler effect in hydrogen positive rays, using
openaire   +2 more sources

A precise multipass method for satellite Doppler positioning

Celestial Mechanics, 1988
A precise and efficient algorithm is developed for determining the locations of radio beacons (e.g. of the ARGOS or COSPAS/SARSAT type) based on Doppler shift measurements in overflying satellites. The method distinguishes itself through: (1) the use of a very compact analytic orbital theory valid for all eccentricities, (2) autonomous orbit ...
Aksnes, K., Andersen, P. H., Haugen, E.
openaire   +1 more source

Acquisition, Doppler Tracking, and Positioning With Starlink LEO Satellites: First Results

IEEE Transactions on Aerospace and Electronic Systems, 2022
Mohammad Neinavaie, Joe Khalife, Zaher Kassas   +2 more
exaly  

Analysis of Baseline Impact on Differential Doppler Positioning and Performance Improvement Method for LEO Opportunistic Navigation

IEEE Transactions on Instrumentation and Measurement, 2023
Chao Zhao, Honglei Qin, Ning Wu
exaly  

Possibilities and Limitations of Doppler Positioning in Geodynamics

1979
During the past years Doppler positioning by aid of artificial satellites, especially within the US Navy Navigation System, has been introduced into large fields of geodesy. This new technique nowadays is used to determine control points especially in countries where we have no unique first order triangulations, to combine national geodetic networks ...
openaire   +1 more source

Doppler Positioning of LEO Satellites Based on Orbit Error Compensation and Weighting

IEEE Transactions on Instrumentation and Measurement, 2023
Danyao Wang, Honglei Qin, Zhigang Huang
exaly  

Doppler Positioning of Dynamic Targets with Unknown LEO Satellite Signals

Electronics (Switzerland), 2023
Linlin Ding
exaly