Results 21 to 30 of about 20,633,503 (274)
Precise orbit determination of Spire nano satellites [PDF]
, 2023 Spire Global, Inc. operates a growing fleet of currently more than 100 CubeSats in different low Earth orbits for commercial Earth observation. These satellites are equipped with dual-frequency GPS receivers and an attitude determination and control ...
Heike Peter +9 more
core +2 more sources
LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges
Geo-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
ANALYSIS OF THE GRAVITY MODELS IMPACT ON LEO SATELLITE ORBIT PREDICTION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Non-spherical gravity plays a crucial role in the LEO satellite orbit determination and prediction. In recent years, several new gravity models have been proposed with more comprehensive ground and space-borne data.
Y. Zhuang, L. Wang
doaj +1 more source
Centimeter-Level Orbit Determination of GRACE-C Using IGS-RTS Data
Remote Sensing, 2023 GNSS real-time applications greatly benefit from the International GNSS Service’s (IGS) real-time service (RTS). This service does more than provide for terrestrial precise point positioning (PPP); it also brings more possibilities for space-borne ...
Duoduo Li, Xuhua Zhou, Kai Li
doaj +1 more source
Geostationary Orbit Surveillance Using the Unscented Kalman Filter and the Analytical Orbit Model [PDF]
Journal of Astronomy and Space Sciences, 2011 A strategy for geostationary orbit (or geostationary earth orbit [GEO]) surveillance based on optical angular observations is presented in this study. For the dynamic model, precise analytical orbit model developed by Lee et al.
Kyoung-Min Roh +2 more
doaj +1 more source
Optimization of Propulsion Systems With Real-Time Precise Orbit Determination Technology to Enable Proximity Operations and Advanced Mission Capabilities [PDF]
, 2023 Precise orbit determination technologies are an increasingly important enabler for the validation of critical in-space satellite propulsion systems. Advanced maneuvers require precise knowledge of impulse to optimize operations related to rendezvous ...
Tobin, Frank +4 more
core +1 more source
Remote Sensing, 2019 This paper describes the sensitivity of both the orbital frame domain selection and the gravity model on the performance of on-board real-time orbit determination.
Eunhyouek Kim +2 more
doaj +1 more source
Assessment of numerical differentiation methods for kinematic orbit solution of the GRACE mission [PDF]
, 2013 textThe historical method of precise orbit determination is a dynamic approach. However, with the improvement of GPS tracking data and associated tracking networks, two newer methods have been developed: reduced-dynamic and kinematic.
Krishnan, Sandeep Kalyanapuram
core +1 more source
Remote Sensing, 2021 Currently, low Earth orbit (LEO) satellites are attracting great attention in the navigation enhancement field because of their stronger navigation signal and faster elevation variation than medium Earth orbit (MEO) satellites.
Junjun Yuan +6 more
doaj +1 more source
Orbit Propagation and Determination of Low Earth Orbit Satellites
International Journal of Antennas and Propagation, 2014 This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit ...
Ho-Nien Shou
doaj +1 more source