Results 121 to 130 of about 135,824 (242)
Beginnings of Satellite Navigation
Kartografija i Geoinformacije, 2008 The first satellite navigation system called the Navy Navigation Satellite System (NNSS) or TRANSIT was planned in the USA in 1958. It consisted of 5-6 artificial Earth satellites, was set in motion for the USA military in 1964, and in 1967 for civilian ...
Miljenko Solarić
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Remote Sensing, 2019 In order to provide better service for the Asia-Pacific region, the BeiDou navigation satellite system (BDS) is designed as a constellation containing medium earth orbit (MEO), geostationary earth orbit (GEO), and inclined geosynchronous orbit (IGSO ...
Zhiwei Qin +7 more
doaj +1 more source
A search for Jovian-mass planets around CM Draconis using eclipse minima timing [PDF]
Astron.Astrophys. 358 (2000) L5-L8, 2000 For the eclipsing binary system CM Draconis, eclipse minimum times have been monitored with high precision between 1994 and 1999. Periodic deviations of minimum times from a linear ephemeris may indicate the presence of an orbiting third body. Individual measurements of 41 eclipse minimum times result in a standard deviation from linear ephemeris of 5 ...
arxiv
Image Positioning Accuracy Analysis for Super Low Altitude Remote Sensing Satellites
International Journal of Advanced Robotic Systems, 2012 Super low altitude remote sensing satellites maintain lower flight altitudes by means of ion propulsion in order to improve image resolution and positioning accuracy.
Ming Xu, Nan Zhou
doaj +1 more source
Direct detection of ultralight dark matter via astronomical ephemeris
Physics Letters B, 2019 A novel idea of the direct detection to search for a ultralight dark matter based on the interaction between the dark matter and a nucleon is proposed. Solar system bodies feel the dark matter wind and it acts as a resistant force opposing their motions.
Hajime Fukuda +2 more
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Updating the Ephemeris and Physical Properties of Five Long-period Transiting Exoplanets Using TESS and CHEOPS [PDF]
arXivThe transiting long-period exoplanets are the most interesting follow-up targets for the next-generation instruments, using the most sophisticated observational techniques. However, the scarcity in their transit events often leads to larger uncertainties in their known ephemeris, also resulting in larger biases in their known physical properties in ...
arxiv
New transit observations for HAT-P-30 b, HAT-P-37 b, TrES-5 b, WASP-28 b, WASP-36 b, and WASP-39 b [PDF]
, 2016 We present new transit light curves for planets in six extrasolar planetary systems. They were acquired with 0.4-2.2 m telescopes located in west Asia, Europe, and South America.
Bruni, I. +16 more
core +2 more sources
Asteroid Perturbations and Mass Determination for the ASTROD Space Mission [PDF]
arXiv, 2004 Due to the high-precision nature of the ASTROD (Astrodynamical Space Test of Relativity using Optical Devices) mission concept, the asteroid perturbations on the ASTROD spacecraft is crucial. These perturbations need to be modelled and determined together with relativistic effects and other solar-system parameters. In a previous investigation (Su et al.
arxiv
Ballistic Coefficient Calculation Based on Optical Angle Measurements of Space Debris. [PDF]
Sensors (Basel), 2023 Ding Y +6 more
europepmc +1 more source
Utilization CSRS-PPP software for recovery aircraft’s position [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2015 The PPP method is applied in aeronautical navigation as a new technique for determination of aircraft’s position. In this paper preliminary results of recovery aircraft’s position were presented.
Kamil KRASUSKI
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