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Topology design algorithm for optical inter-satellite links in future navigation satellite networks
At present, deployment of optical inter-satellite link (OISL) payloads on future navigation satellites are planned for each global navigation...
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On-board validation of BDS-3 autonomous navigation using inter-satellite link observations
The third generation of the BeiDou navigation satellite system (BDS-3) has accomplished a complete constellation with 30 BDS-3 satellites in 2020....
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Rolling weight-matching methods for the inter-satellite link assignment in global navigation satellite systems
Inter-satellite links (ISLs) have become an important technology for develo** global navigation satellite systems (GNSSs). Due to satellite...
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Estimation and analysis of BDS-3 satellite yaw attitude using inter-satellite link observations
China has completed the full BDS-3 constellation with satellites manufactured, respectively, by China Academy of Space Technology (CAST) and Shanghai...
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Centimeter-level clock synchronization and space-borne timescale generation for BDS-3 using inter-satellite link measurements
Because modernized global navigation satellite systems (GNSSs) carry high-performance atomic clocks onboard, a new problem has arisen regarding...
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BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links
The BeiDou navigation satellite system (BDS) tracks medium earth orbit (MEO) satellites using only regional tracking stations in China. As a result,...
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The application of inter-satellite links connectivity schemes in various satellite navigation systems for orbit and clock corrections determination: simulation study
Inter-Satellite Links (ISLs) are intended to improve precision of orbit determination and satellite clock estimation. The ISLs provide a precise...
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Inter-satellite link assignment for the laser/radio hybrid network in navigation satellite systems
The Ka inter-satellite link (ISL) has been applied in the new generation of the BeiDou Navigation Satellite System. The next move is to supplement...
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Galileo precise orbit determination with optical two-way links (OTWL): a continuous wave laser ranging and time transfer concept
In this simulation study we analyze the benefit of ground-space optical two-way links (OTWL) for Galileo precise orbit determination (POD). OTWL is a...
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Orbit and clock analysis of BDS-3 satellites using inter-satellite link observations
China is currently focusing on the establishment of its BDS-3 system, and a BDS-3 constellation with 18 satellites in medium Earth orbit (MEO) and...
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Analysis of preliminary results from distributed autonomous timekee** on Beidou-3 satellites
Autonomous timekee** is necessary to maintain the navigation system time when the ground operation control system is unavailable. We use Ka-band...
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Links between volcanic activity and flank creep behavior at Pacaya Volcano, Guatemala
Magmatism is a recognized potential driver of volcanic flank instability. Recently, this driver was identified at Pacaya Volcano, Guatemala, where a...
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Inconsistent Atlantic Links to Precipitation Extremes over the Humid Tropics
This study investigates extreme wet and dry conditions over the humid tropics and their connections to the variability of the tropical ocean basins...
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Studies of scintillations and TEC variations with GPS satellite links together with soil radon anomalies preceding Nepal earthquakes of April–May 2015
Ionospheric effects like scintillations and anomalous variations in total electron content (TEC) monitored with Global Positioning System (GPS)...
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Enhanced surface temperature over India during 1980–2020 and future projections: causal links of the drivers and trends
The Earth’s surface temperatures have increased significantly since the beginning of industrialisation. The high emissions of greenhouse gases have...
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Initial results of distributed autonomous orbit determination for Beidou BDS-3 satellites based on inter-satellite link measurements
Autonomous orbit determination (AOD) is the ability of navigation satellites to estimate with accurate satellite orbit parameters using onboard using...
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Diurnal variations of global clouds observed from the CATS spaceborne lidar and their links to large-scale meteorological factors
Diurnal cycle of cloud (DCC), referring to the diurnal variation of cloud macro- and micro-physical properties, thus largely determining the strength...
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Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations
The Beidou-3 system (BDS-3) satellites are deployed, equipped with an inter-satellite link (ISL) payload, so that the satellite–satellite or...
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Development trends of the national secure PNT system based on BDS
Satellite navigation systems are vulnerable. To guarantee the positioning, navigation and timing (PNT) safety of core infrastructure, it is necessary...
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Improving undifferenced precise satellite clock estimation with BDS-3 quad-frequency B1I/B3I/B1C/B2a observations for precise point positioning
Estimates of satellite clock offsets typically employ dual-frequency undifferenced (UD) ionospheric-free (IF) observations from global network. The...
