• No results found

Low Earth Orbit (leo)

Solar Arrays and Battery Power Sources Conceptual Design for Low Earth Orbit Microsatellites

Solar Arrays and Battery Power Sources Conceptual Design for Low Earth Orbit Microsatellites

... Abstract: The power system is a vital subsystem in a spacecraft. As long as the spacecraft has power, it can perform its mission. Almost all other failures can be worked out by ground operations from ground stations but ...

5

Atmospheric influences on infrared-laser signals used for occultation measurements between Low Earth Orbit satellites

Atmospheric influences on infrared-laser signals used for occultation measurements between Low Earth Orbit satellites

... Abstract. LEO-LEO infrared-laser occultation (LIO) is a new occultation technique between Low Earth Orbit (LEO) satellites, which applies signals in the short wave infrared spectral range (SWIR) ...

20

Remote automated multi generational growth and observation of an animal in low Earth orbit

Remote automated multi generational growth and observation of an animal in low Earth orbit

... Colonization of other planets is deemed realistic [1]. This would mitigate against Earth’s periodic global extinction events [2] and the next ice age; our nearest relative, Neanderthal, went extinct in the last ice age. ...

5

Diagnosing low earth orbit satellite anomalies using NOAA 15 electron data associated with geomagnetic perturbations

Diagnosing low earth orbit satellite anomalies using NOAA 15 electron data associated with geomagnetic perturbations

... satellite orbit, solar and geomagnetic activities, satellite local time, and satellite construction ...the low Earth orbit (LEO) ...to low-energy electron fluxes of 30–100 keV and ...

16

Automatic planning and scheduling of active removal of non-operational satellites in low earth orbit

Automatic planning and scheduling of active removal of non-operational satellites in low earth orbit

... in Earth orbit. Recent studies have concluded that regions within Low Earth Orbit (LEO) have already reached a critical den- sity of objects which will eventually lead to a cascading ...

15

Automatic trajectory planning for low-thrust active removal mission in Low-Earth Orbit

Automatic trajectory planning for low-thrust active removal mission in Low-Earth Orbit

... In this paper two strategies are proposed to de-orbit up to 10 non- cooperative objects per year from the region within 800 and 1400 km altitude in Low Earth Orbit (LEO). The underlying idea ...

53

Conical Linear Spiral Antenna for Tracking, Telemetry and Command of Low Earth Orbit Satellites

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 linear ...

11

The role of high resolution geomagnetic field models for investigating ionospheric currents at low Earth orbit satellites

The role of high resolution geomagnetic field models for investigating ionospheric currents at low Earth orbit satellites

... at low Earth orbit (LEO) altitude, Ritter and Lühr (2006) investigated on the one hand the behavior of residuals in the total field, representing the signals from the auroral electrojet, and on the ...

10

An Assessment of Rare Earth Aluminates as Possible Radiation Shields for Artificial Satellites in Low Earth Orbit

An Assessment of Rare Earth Aluminates as Possible Radiation Shields for Artificial Satellites in Low Earth Orbit

... rare earth alumi- nates as possible radiation shields for its application in Low Earth Orbit (LEO) satellite ...rare earth aluminate walls (YAlO 3 , LaAlO 3 , NdAlO 3 and ...

10

Initial Orbit Determination Error Analysis of Low-Earth Orbit Rocket Body Debris and Feasibility Study for Debris Cataloguing from One Optical Facility

Initial Orbit Determination Error Analysis of Low-Earth Orbit Rocket Body Debris and Feasibility Study for Debris Cataloguing from One Optical Facility

... radar is a part of the larger Goldstone Deep Space Communications Complex, which is one of three sites that constitute the NASA Deep Space Network [22]. Nominally tasked with communicating with deep space missions, the ...

146

Self-organising low Earth orbit constellations for Earth observation

Self-organising low Earth orbit constellations for Earth observation

... This paper presents a novel method of manipulating the spatial pattern of a frac- tionated micro-satellite constellation in Low Earth Orbit. The method developed allows satellites to manipulate the ...

15

Atmospheric Remnants in the Low Earth Orbit Region around 200 km Altitude

Atmospheric Remnants in the Low Earth Orbit Region around 200 km Altitude

... the Earth Atmospheric Remnants (AtR) composition at altitudes from 180 km to 240 km is of paramount importance for the development of air-breathing technology which is of interest here, mainly ad- dressing needs ...

7

The Cost of Clean Space- A Study of the Additional Fuel Costs of Launching Above Low Earth Orbit

The Cost of Clean Space- A Study of the Additional Fuel Costs of Launching Above Low Earth Orbit

... “graveyard” orbit that makes way for new satellites. Medium Earth Orbit (MEO) is the region between LEO and GEO which is not overly populated or of great concern for debris ...in orbit are in ...

46

The Injection Velocity and Apogee Simulation for Transfer Elliptical Satellite Orbits

The Injection Velocity and Apogee Simulation for Transfer Elliptical Satellite Orbits

... of low Earth orbit (LEO) and geostationary Earth orbit (GEO) satellites ...geostationary orbit be- cause of too large distance form the Earth, takes few ...a low ...

5

Computing call blocking probabilities in LEO satellite networks: The single orbit case

Computing call blocking probabilities in LEO satellite networks: The single orbit case

... Keywords: Low earth orbit satellite networks, all bloking probability, hand-os, deomposition algorithms.. Department of Computer Siene.[r] ...

25

Trajectory Design and Optimization for LEO Satellites in Formation to Observe GEO Satellites’ Beams

Trajectory Design and Optimization for LEO Satellites in Formation to Observe GEO Satellites’ Beams

... an Earth-fixed observer ...the orbit design and optimization mission for the low earth orbit (LEO) satellites in formation to observe the GEO satel- lites’ beams ...

18

Information Society Trends Issue 22, 1994

Information Society Trends Issue 22, 1994

... LEGISLATION The US Federal Communications Commission FCC has approved rules that would allow as many as six companies to share the radio spectrum for low-earth orbit LEO satellite servic[r] ...

7

Sunlight effects on the 3D polar current system determined from low Earth orbit measurements

Sunlight effects on the 3D polar current system determined from low Earth orbit measurements

... the low Earth orbiting Swarm and CHAMP satellites, are used to co-estimate poloidal and toroidal parts of the magnetic disturbance field, represented in magnetic apex coordi- ...

19

Hybrid low-thrust transfers to eight-shaped orbits for polar observation

Hybrid low-thrust transfers to eight-shaped orbits for polar observation

... from low Earth orbit (LEO) to so-called eight-shaped orbits at the collinear libration points in the circular restricted three-body problem are ...elliptic orbit. From there, the ...

19

The Research of Low Earth Orbit Prediction of Satellite Based on Deep Neural Network

The Research of Low Earth Orbit Prediction of Satellite Based on Deep Neural Network

... satellite orbit prediction, the long short-term memory neural network prediction is carried out based on the actual data of X, Y and Z coordinates of the satellite's geocentric inertial coordinate ...near-circular ...

9

Show all 10000 documents...

Related subjects