low-Earth orbit satellites
Atmospheric influences on infrared-laser signals used for occultation measurements between Low Earth Orbit satellites
... two Low Earth Orbit (LEO) satellites and thereby pass the Earth’s atmosphere; the focus region is the upper troposphere/lower stratosphere (UTLS) (5 km to 35 ...
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The role of high resolution geomagnetic field models for investigating ionospheric currents at low Earth orbit satellites
... their Figure 7), which, in this case, corresponds to an uncertainty of about 10 %. Alken et al. (2015) compared direct outputs of electric field predictions derived from EEJ observations by CHAMP and Swarm, and similar ...
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Conical Linear Spiral Antenna for Tracking, Telemetry and Command of Low Earth Orbit Satellites
... Abstract—Conical log spiral antennas are famous for being appro- priate for tracking, telemetry and command (TT&C) applications in low earth orbit (LEO) satellites. In this work, a conical ...
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Earth Quake Prediction Using Satellites
... 2.2.1 Telephone: Remote islands such as Saint Helena, Diego Garcia and Easter Island are the places where no under-sea cables can be employed are in need of satellite telephones. There are also regions of some continents ...
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Elevation Variation with Low Earth Orbiting Search and Rescue Satellites for the Station Implemented in Kosovo
... (Low Earth Orbit) environmental satellites provide continuous coverage of Earth, supplying high-resolution global meteorological, oceanic and space observation data what are too ...
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The Range and Horizon Plane Simulation for Ground Stations of Low Earth Orbiting (LEO) Satellites
... LEO satellites have very wide applications, from remote sensing of oceans, through analyses on Earth’s climate changes, Earth’s imagery with high resolution or astro- nomical purposes ...of orbit than into ...
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Sunlight effects on the 3D polar current system determined from low Earth orbit measurements
... In this study, we present global statistical patterns of both the horizontal equivalent current and the Birke- land currents, estimated using magnetic field measure- ments from the CHAMP and Swarm satellites, ...
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The Downlink Adjacent Interference for Low Earth Orbiting (LEO) Search and Rescue Satellites
... own orbit), which for too low angles can be considered as ...these satellites are always moving with a particular velocity , the question is how long they can be together within a separation angle of ...
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The Cost of Clean Space- A Study of the Additional Fuel Costs of Launching Above Low Earth Orbit
... prospective satellites to be registered to a specific location in GEO through the International Telecommunications ...“graveyard” orbit that makes way for new satellites. Medium Earth ...
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Atmospheric Remnants in the Low Earth Orbit Region around 200 km Altitude
... Empirical models have been reported to be in agreement with the available experimental results even if some discrepancies exist [5]. Experiments include mainly satellite observations. The CHAMP (250 km - 450 km), GRACE ...
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Self-organising low Earth orbit constellations for Earth observation
... The remainder of this paper is organised as follows. The next section introduces the constellation model used, which consists of two polar low Earth orbital planes containing Earth imaging ...
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Automatic trajectory planning for low-thrust active removal mission in Low-Earth Orbit
... As introduced in Sec. 2, the two proposed ADR strategies are analogous to the typical TSP and VRP. In the TSP the goal is to minimise the total path length to visit every town/node once and only once. In the Deorbiting ...
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Selection of an orbit for communication satellite based on inclination and eccentricity
... geostationary orbit for a communication ...the low earth parking orbit and finally tionary orbit is been calculated theoretically and ...geostationary orbit is attained and ...
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Earth’s Magnetic Field for Spacecraft Attitude Control Applications (TECHNICAL NOTE)
... employing satellites in low earth orbit (LEO) has an increasing ...LEO satellites functionally experience the earth’s magnetic field more than other ...
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Effectiveness of GNSS disposal strategies
... Medium Earth Orbit (MEO) region as a whole is a subject that cannot be deferred, due to the growing exploitation and launch rate in that orbital ...end-of-life orbit for every proposed strategy, ...
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Automatic planning and scheduling of active removal of non-operational satellites in low earth orbit
... To generate the surrogate model, a limited set of trans- fers are computed for a limited number of possible masses of the spacecraft and time of flights. The data obtained are then used to construct a surrogate model for ...
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Electrodynamic Tether System for Propellantless De-Orbiting
... of low Earth orbit—from 200 to 2,000 kilometers above the surface has become littered with tens of thousands of objects, including defunct satellites, rocket motors, explosion debris and ...
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Comparative Study Of Leo, Meo & Geo Satellites
... into orbit for the large number of ...military Earth observation satellites, communication satellites, weather satellites, navigation satellites, and research ...The orbit ...
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Solar Arrays and Battery Power Sources Conceptual Design for Low Earth Orbit Microsatellites
... satellites are required to fulfill their requirements on power consumption to sustain their life in space. As typical ones use photovoltaic cells to generate solar power, the presence of a sunlight phase is ...
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Autonomous control of a reconfigurable constellation of satellites on geostationary orbit with artificial potential fields
... of low ∆v with high T conv . This could also be useful for Earth observation or space science missions which wish to study effects or features associated with different seasons, ...
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