Results 21 to 30 of about 4,573 (258)

Orbit Determination of GPS and Koreasat 2 Satellite Using Angle-Only Data and Requirements for Optical Tracking System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
Gauss method for the initial orbit determination was tested using angle-only data obtained by orbit propagation using TLE and SGP4/SDP4 orbit propagation model.
Woo-Kyoung Lee   +5 more
doaj   +1 more source

Test and Performance Analysis Methods of Low Earth Orbit GPS Receiver [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2006
The use of GPS receiver at outer space becomes common in low earth orbit. Recently most of satellites use GPS receiver as navigation solution for finding satellite position.
Dae-Won Chung, Sang-Jeong Lee
doaj   +1 more source

Review of the Precise Orbit Determination for Chinese Lunar Exploration Projects

open access: yesEarth and Space Science, 2021
China's lunar exploration program has developed and progressed for more than 13 years. Over this time, Precise Orbit Determination (POD) has guaranteed successful execution of the Chang’e missions, and is the basis for further scientific investigations ...
Shanhong Liu   +6 more
doaj   +1 more source

A Concise Method for Calibrating the Offset of GPS Precise Satellite Orbit

open access: yesRemote Sensing, 2022
A set of Global Navigation Satellite Systems (GNSS) satellite orbit and clock offset are an essential prerequisite for precise application. However, abrupt changes in accuracy at the boundaries are prevalent in products provided by international GNSS ...
Hu Yang   +4 more
doaj   +1 more source

A Sensitivity Study of POD Using Dual-Frequency GPS for CubeSats Data Limitation and Resources

open access: yesRemote Sensing, 2020
Making use of dual-frequency (DF) global navigation satellite system (GNSS) observations and good dynamic models, the precise orbit determination (POD) for the satellites on low earth orbits has been intensively investigated in the last decades and has ...
Kan Wang   +3 more
doaj   +1 more source

Calibration of GRACE on-board accelerometers for thermosphere density derivation

open access: yesGeo-spatial Information Science, 2022
Low Earth Orbit satellite on-board accelerometers play an important role in improving our understanding of thermosphere density; however, the accelerometer-derived densities are subject to accelerometer calibration errors.
Min Li   +5 more
doaj   +1 more source

Precise Orbit Determination of BDS-2 and BDS-3 Using SLR

open access: yesRemote Sensing, 2019
The BeiDou Navigation Satellite System (BDS) of China is currently in the hybrid-use period of BDS-2 and BDS-3 satellites. All of them are equipped with Laser Retroreflect Arrays (LRAs) for Satellite Laser Ranging (SLR), which can directly obtain an ...
Honglei Yang   +4 more
doaj   +1 more source

Analysis of the Impact of Atmospheric Models on the Orbit Prediction of Space Debris

open access: yesSensors, 2023
Atmospheric drag is an important influencing factor in precise orbit determination and the prediction of low-orbit space debris. It has received widespread attention.
Yigao Ding   +6 more
doaj   +1 more source

LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges

open access: yesGeo-spatial Information Science, 2021
With the completion of Chinese BeiDou Navigation Satellite System (BDS), the world has begun to enjoy the Positioning, Navigation, and Timing (PNT) services of four Global Navigation Satellite Systems (GNSS).
Haibo Ge   +8 more
doaj   +1 more source

BDS Orbit Maneuver Detection Based on Epoch-Updated Orbits Estimated by SRIF

open access: yesRemote Sensing, 2023
The orbit maneuver detection is crucial in Global Navigation Satellite System (GNSS) precise orbit determination, which is necessary for adjusting data processing strategies.
Zhiwei Qin   +5 more
doaj   +1 more source

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