Results 31 to 40 of about 7,276 (303)
Multi-LEO Satellite Stereo Winds
Remote Sensing, 2023 The stereo-winds method follows trackable atmospheric cloud features from multiple viewing perspectives over multiple times, generally involving multiple satellite platforms. Multi-temporal observations provide information about the wind velocity and the observed parallax between viewing perspectives provides information about the height.
James L. Carr +3 more
openaire +2 more sources
Performance Analysis of LEO Satellite Networks [PDF]
, 2002 We present an analytical model for computing call blocking probabilities in a LEO satellite network that carries voice calls. Both satellite-fixed and earth-fixed constellations with inter-orbit links and hand-offs are considered. The model is analyzed approximately by decomposing it into sub-systems.
Abdul Halim Zaim +2 more
openaire +1 more source
LEO ISL-Assisted BDS-3 and LEO Rapid Joint Precise Orbit Determination
Remote SensingBDS-3 faces challenges in achieving precision orbit determination (POD) due to the difficulty of establishing a globally uniform distribution of independently operated ground tracking stations. The use of onboard BDS-3 observations collected by low Earth
Le Wang +4 more
doaj +1 more source
Visibility of LEO satellites under different ground network distributions [PDF]
, 2022 The Low Earth Orbit (LEO) satellites have shown various benefits in augmenting the Positioning, Navigation and Timing (PNT) service based on Global Navigation Satellite Systems (GNSSs).
Wang, Kan, El-Mowafy, Ahmed, Yang, Xuhai
core
Precise Onboard Time Synchronization for LEO Satellites [PDF]
, 2022 Onboard time synchronization is an important requirement for a wide range of low Earth orbit (LEO) missions such as altimetry or communication services, and extends to future position, navigation, and timing (PNT) services in LEO.
Kunzi, Florian, Montenbruck, Oliver
core +1 more source
Optimization Design of Routing Algorithm Based on GEO/LEO Double-Layer Satellite Network [PDF]
Jisuanji gongcheng, 2020 Satellite network topology is temporally variant,causing frequent link interruption and end to end long delay between satellites.To address the problem,this paper constructs a double-layer network architecture for satellites on Geosynchronous Earth Orbit(
ZHANG Taijiang, LI Yongjun, ZHAO Shanghong
doaj +1 more source
, 2021 The differential code biases (DCBs) of the global positioning system (GPS) receiver onboard low-Earth orbit (LEO) satellites are commonly estimated by a local spherical symmetry assumption together with the known GPS satellite DCBs from ground-based ...
Jin, Shuanggen +5 more
core +1 more source
Opportunistic Navigation with Iridium Next LEO Satellites [PDF]
, 2020 The concept of opportunistic navigation arises from the future demands that autonomous vehicles will require in order to navigate in a reliable and accurate way in GNSS-challenged environments.
Acebes Cebrian, Carlos
core +1 more source
Satellite handover techniques for LEO networks [PDF]
International Journal of Satellite Communications and Networking, 2004 AbstractLow earth orbit satellite constellations could play an important role in future mobile communication networks due to their characteristics, such as global coverage and low propagation delays. However, because of the non‐stationarity of the satellites, a call may be subjected to handovers, which can be cell or satellite handovers.
Papapetrou, E. +3 more
openaire +2 more sources
GEODA-GRUA: Adaptive Multibeam Conformal Antenna for Satellites Communications
, 2011 The GEODA-GRUA is one conformal adaptive antenna array designed for satellite communications. Operating at 1.7 GHz with circular polarization, it is possible to track and communicate with several satellites at once being able to receive signals in full ...
Arias Campo, Marta +11 more
core +1 more source