Satellite / PCN Compatibility for Worldwide Mobility based on Resonant Sun - Synchronous Orbits
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This paper reviews some basic equations of motion and coverage of satellites in earth orbit as well as examining satellite constellation design techniques. Specific orbit properties are highlighted and their applicability to constellation design and earth coverage are then investigated. A PCN oriented satellite constellation is then proposed with some unique properties. The proposed constellation scheme allows for a reduction in overall system cost in two ways. Firstly, simplification in satellite design result in satellite development costs being reduced and secondly, because each satellite will be designed for a particular orbit, constellation lifetime can be significantly extended.Keywords:
Satellite constellation
Medium Earth orbit
Satellite broadcasting
Orbit (dynamics)
Communications satellite
Satellite missions demand ever greater connectivity, especially in the LEO regime. In this paper, we introduce the new mega-constellation services in space paradigm: we show that mega-constellations, deployed to offer innovative services to Earth's users, can provide excellent connectivity to LEO spacecrafts, too. First, we characterise the communication link between space users and the actual OneWeb and Starlink constellations. A full set of results in terms of availability, access duration, Doppler, and path losses as a function of user orbital parameters, identifying optimal user orbits, is provided. The results achieved by a multi-system user able to communicate with both fleets are also presented. The potential improvements available if geostationary constellations are used to complement LEO mega-constellations in a multi-orbit system are discussed, too. Finally, we focus on two LEO use cases, the International Space Station and an Earth Observation Sun Synchronous satellite. All the results demonstrate the numerous advantages of the mega-constellation connectivity solution, which is able to transform LEO spacecrafts into highly responsive nodes of a space-to-space network.
Satellite constellation
Medium Earth orbit
Mega-
Earth observation
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The programming scheme of low earth orbit(LEO) constellation suitable for China is brought forward in allusion to the shortcomings of global constellation such as high cost,great technical difficulties and long period of realization.A low earth orbit constellation which is able to cover middle and low latitudes continuously is designed with 24 satellites after analysis of basic questions in constellation design.The optimized scheme of 4 satellites in the first step is studied with assumed backgrounds on the base of the constellation structure already designed.The coverage identity of the constellation is simulated and analysed by STK,which validates the advantages of continuously coverage constellation and provides some references for building China′s LEO satellite constellation.
Satellite constellation
Medium Earth orbit
Orbit (dynamics)
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The high number of objects in the LEO is a risk that collisions between sub-orbital or escape velocity objects with an orbiting object of satellites occur when two satellites collide while orbiting the earth. One of the approaches to avoid collisions is a robotic configuration of satellite constellations. Satellite constellations should not be confused with satellite clusters, which are groups of satellites moving in close proximity to each other in nearly identical orbits; nor with satellite series or satellite programs, which are generations of satellites launched successively; nor with satellite fleets, which are groups of satellites from the same manufacturer or operator that operate an independent system. CfEOS constellations designed for geospatial applications and Earth observation. Unlike a single satellite, a constellation can provide permanent global or near-global coverage anywhere on Earth. CfEOS constellations are configured in sets of complementary orbital planes and connect to ground stations located around the globe. This paper describes the GNC analysis, the orbit propagation and robotic systems configuration for Collision-free Earth observation satellites (CfEOS) constellations.
Satellite constellation
Medium Earth orbit
Geocentric orbit
Orbit (dynamics)
Orbital elements
Earth observation
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In space information networks, satellites are generally in high speed orbit motion. In order to obtain better spacial and temporal coverage performance, satellites should cooperate with each other as a constellation. Previous works on constellations mainly focus on global seamless coverage using fewer satellites. However, like most countries, it is hard for China to build ground stations in overseas, and the geostationary Earth orbit position resource is scarce. In this paper, we investigate the constellation design problem with restricted ground supporting. We first proposes a "backbone network + enhanced network" hybrid constellation design approach. Then a hybrid "4GEO+SIGSO" constellation is designed using the proposed approach, and the coverage performance of this constellation is analyzed in detail. Simulation results show the proposed approach can realize global seamless coverage only using a small number of satellites. Furthermore, the proposed hybrid constellation meets the coverage demand only relies on ground stations inside China.
Satellite constellation
Satellite broadcasting
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In this paper, a constellation of four low earth orbit nanosatellites for disaster monitoring is presented; their small size, low cost, and short time development give them the opportunity to be widely selected. The space segment is based on existing subsystems that are assembled on the bottom part of a developed structure and present acceptable performance for the mission. The payload is a multispectral camera which fulfills the mission's requirements (remote sensing). The ground segment is based on an existing modular ground station, used for the ALSAT-1 DMC, which will be adapted to fit with the specifications of the mission.
Payload (computing)
Satellite constellation
Ground segment
Orbit (dynamics)
Ground station
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This paper reviews some basic equations of motion and coverage of satellites in earth orbit as well as examining satellite constellation design techniques. Specific orbit properties are highlighted and their applicability to constellation design and earth coverage are then investigated. A PCN oriented satellite constellation is then proposed with some unique properties. The proposed constellation scheme allows for a reduction in overall system cost in two ways. Firstly, simplification in satellite design result in satellite development costs being reduced and secondly, because each satellite will be designed for a particular orbit, constellation lifetime can be significantly extended.
Satellite constellation
Medium Earth orbit
Satellite broadcasting
Orbit (dynamics)
Communications satellite
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Citations (1)
Abstract In space information networks, satellites are generally in high speed orbit motion. In order to obtain better spacial and temporal coverage performance, satellites should cooperate with each other as a constellation. Previous works on constellations mainly focus on global seamless coverage using fewer satellites. However, like most countries, it is hard for China to build ground stations in overseas, and the geostationary Earth orbit position resource is scarce. In this paper, we investigate the constellation design problem with restricted ground supporting. We first proposes a “backbone network + enhanced network” hybrid constellation design approach. Then a hybrid “4GEO+5IGSO” constellation is designed using the proposed approach, and the coverage performance of this constellation is analyzed in detail. Simulation results show the proposed approach can realize global seamless coverage only using a small number of satellites. Furthermore, the proposed hybrid constellation meets the coverage demand only relies on ground stations inside China.
Satellite constellation
Medium Earth orbit
Position (finance)
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Spaceborne netted radars are of benefit for low-earth-orbit (LEO) object detection. Methods of constellation design are presented in detail by mean of the analysis on satellite orbital parameters, types of constellation coverage and other parameters related to constellation design. Simu-lations on LEO objects detection using spaceborne netted radars are implemented under the constraint of rational operating parameters of space-based radars. Walker con-stellation and non-Walker constellation with different pa-rameter configuration are compared in terms of observation time gap for one satellite as an example, followed by the statistical results of observation time intervals for more than one hundred objects. The simulation results show that the observation time intervals for LEO objects can be shortened effectively by means of spaceborne netted radars, resulting in higher coverage ratio of observation.
Satellite constellation
Orbit (dynamics)
Earth observation
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The regional navigation constellation composed of three geostationaries and four inclined circle orbit satellites is analyzed. Raise a project of constellation composed of five or six satellites. The feasibility of two projects is analyzed by simulation, then compare the performance of five satellites and six satellites, finally design a constellation of five satellites composed of geostationary and inclined circle orbit satellites.
Satellite constellation
Orbit (dynamics)
Medium Earth orbit
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In this paper LEO-polar constellation for full earth coverage is investigated. Some important features of a constellation are introduced such as number of satellites and orbits needed for continues coverage, handover, intersatellite links and seam. Also the effects of satellite altitude on minimum elevation angle are analyzed and in the end some numeric results are gained.
Satellite constellation
Polar orbit
Orbit (dynamics)
Medium Earth orbit
Geocentric orbit
Elevation (ballistics)
Sun-synchronous orbit
Earth's orbit
Satellite broadcasting
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