Results 81 to 90 of about 164,653 (221)
Remote Sensing, 2021 On 31 July 2020, the Beidou global navigation satellite system (BDS-3) was officially announced as being commissioned. In addition to offering global positioning, navigation, and timing (PNT) services, BDS-3 also provides precise point positioning (PPP ...
Zhixi Nie +3 more
doaj +1 more source
Phoenix-XNS - A Miniature Real-Time Navigation System for LEO Satellites [PDF]
, 2006 The paper describes the development of a miniature GPS receiver with integrated real-time navigation system for orbit determination of satellites in low Earth orbit (LEO).
Gill, Eberhard, Montenbruck, Oliver
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IET Radar, Sonar &Navigation, Volume 18, Issue 4, Page 564-576, April 2024.The paper describes a processing scheme to extract discriminating features from Inverse Synthetic Aperture Radar images of objects in space and how these discriminators can be used to recognise or to estimate the intention of these objects. It describes how electromagnetic simulation can be used to create images to train the object recognition ...
Mikhail Cherniakov +4 more
wiley +1 more source
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.Under most circumstances, the current studies related to precision orbit determination (POD) using intersatellite link (ISL) measurements are limited to ISL ranging components. In this article, we would like to discuss the idea of jointly using the GNSS observations and ISL ranging and orientation measurements of the Tianzhou‐6 (TZ‐6) spacecraft to ...
Haijian Fang +9 more
wiley +1 more source
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.The BeiDou Global Navigation Satellite System (BDS‐3) has been providing global positioning, navigation, and timing (PNT) services for over 3 years. Single‐frequency single point positioning (SPP) receivers have significant advantages such as low hardware cost and easy implementation, making them widely used in engineering practice.
Xingli Sun, Dakun Sun
wiley +1 more source
T‐SPP: Improving GNSS Single‐Point Positioning Performance Using Transformer‐Based Correction
International Journal of Intelligent Systems, Volume 2024, Issue 1, 2024.GNSS (global navigation satellite systems) technology enables high‐precision single‐point positioning (SPP) in open environments. However, the accuracy of GNSS positioning is significantly compromised in complex urban canyons due to signal obstructions and non‐line‐of‐sight propagation errors.
Fan Wu +6 more
wiley +1 more source
Networked differential GPS system [PDF]
, 1994 An embodiment of the present invention relates to a worldwide network of differential GPS reference stations (NDGPS) that continually track the entire GPS satellite constellation and provide interpolations of reference station corrections tailored for ...
Kalafus, Rudolph M. +3 more
core +1 more source
TEMPO2, a new pulsar timing package. I: Overview
, 2006 Contemporary pulsar timing experiments have reached a sensitivity level where systematic errors introduced by existing analysis procedures are limiting the achievable science.
Backer +50 more
core +1 more source
BeiDou Satellite Unhealthy States and the Impact on System Performance
Sensors, 2018 The BeiDou system satellites may be unhealthy due to many reasons, affecting system performance in different ways. Therefore, it is important to analyze the causes and characteristics of the satellites’ unhealthy states. In this study, these states
Caibo Hu +4 more
doaj +1 more source
Accuracy Study of a Single Frequency Receiver Using a Combined GPS/GALILEO Constellation [PDF]
, 2005 As the date of availability of GALILEO approaches, more and more interest appears to pre-evaluate the accuracy of GALILEO and combined GPS+ GALILEO receivers. The majority of simulations made are based on the general use of UERE (often presented as a
Belabbas, Boubeker +2 more
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