Results 41 to 50 of about 968,206 (211)
IEEE Access, 2020 In Wi-Fi fingerprint positioning, what we should most care about is the distance relationship between the user and the reference points (RP). However, most of the existing weighted k-nearest neighbor (WKNN) algorithms use the Euclidean distance of ...
Boyuan Wang +6 more
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Transit satellite system timing capabilities [PDF]
, 1978 Current time transfer capabilities of the Transit Satellite System are reviewed. Potential improvements in the changes in equipment and operational procedures using operational satellites are ...
Finsod, T. D.
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Development of the IANS Chain Using a Satellite System [PDF]
TransNav, 2014 This paper presents ideas for creating and developing Interactive Navigational Structures (IANS) by using satellite systems. The author of the present paper introduced the concept of IANS into the literature in 2004 (Czaplewski, 2004). The paper presents
Krzysztof Czaplewski
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Lasers for coherent optical satellite links with large dynamics
, 2013 We present the experimental realization of a laser system for ground to satellite optical Doppler ranging at the atmospheric turbulence limit. Such a system needs to display good frequency stability (a few parts in 10^{-14}) whilst allowing large and ...
Acef, Ouali +4 more
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Technical approbation of the method for testing on vibration effects of on-board radio-electronic equipment of spacecrafts [PDF]
Космические аппараты и технологииThe article provides a description of the developed method, which ensures the correct realization of mechanical tests of on-board radio-electronic equipment of spacecrafts for vibration effects in the process of ground experimental testing.
A. А. Khvalko +4 more
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Comparison of GRUAN RS92 and RS41 Radiosonde Temperature Biases
Atmosphere, 2021 In this study, we validated the consistency of the GRUAN RS92 and RS41 datasets, versions EDT.1 and GDP.2, in the upper troposphere and lower stratosphere (200–20 hPa), through dual launch campaigns at the GRUAN site and using the radio occultation (RO ...
Xin Jing +3 more
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Satellite Power System (SPS) public outreach experiment [PDF]
, 1980 An outreach experiment was conducted to improve the results of the satellite power system (SPS) concept development and evaluation program. The objectives of the outreach were to: (1) determine the areas of major concern relative to the SPS concept and ...
Mcneal, S. R.
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Development of a new method for creating the working surface of a large-sized transformable reflector [PDF]
Космические аппараты и технологииIn the design of large-sized umbrella-type reflectors, a form-building structure is used to create the working surface. The form-building structure in the open position is a system of tensioned threads.
P. V. Belousov +3 more
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ISPRS International Journal of Geo-InformationSlant range geometry plays a crucial role in interpreting synthetic aperture radar (SAR) observations, especially in converting line-of-sight (LOS) surface deformations to actual vertical subsidence. This paper proposes a new conversion model to retrieve
Jie Liu +4 more
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Satellite retrieval system [PDF]
, 1983 A satellite retrieval system with first and second pairs of coacting parallel bars are separately mounted in spaced parallel planes on the front of a spacecraft.
Loughead, T. E. +2 more
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