Results 231 to 240 of about 911,639 (290)

Accuracy of seven GPS-based geolocation techniques <i>versus</i> a surveyor map: a cross-sectional study in a village in the Comoros. [PDF]

BMJ Open
Dens S, Ronse M, Smekens T, Shih K, Snijders R, Nieto-Sanchez C, Maoulida HA, Moundji E, Ali IS, Absoir CB, Anny WMNA, Azihari M, Attoumane A, Hasker E, Assoumani Y, Peeters K, Verdonck K.   +16 more
europepmc   +1 more source

Random-Forest-Based Smartphone GNSS Position Correction Using Satellite-Wise LOS Projection Error Estimation and Exponential Temporal WLS. [PDF]

Sensors (Basel)
Jang K, Seo K.
europepmc   +1 more source

A Method for Enhancing the Positioning Performance of PPP-B2b by Integrating Galileo Observation. [PDF]

Sensors (Basel)
Shang X, Liu L, Yuan Y, Tong M, He Q, Gong X.   +5 more
europepmc   +1 more source

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The Navigation of Navigation Satellites

Journal of Navigation, 1986
The orbits of navigation satellites have to be determined very precisely. The Transit broadcast (predicted) ephemeris, which is computed by the US Navy Astronautics Group, has an estimated orbital positional accuracy of the order of 25 m in each direction.
V. Ashkenazi, T. Moore
openaire   +1 more source

Satellite Navigation Systems

, 2016
This chapter describes the Global Navigation Satellite Systems (GNSS) used for positioning and navigation applications. Although a satellite navigation system is very complex, it is common to speak of a “satellite navigation system sensor” when referring to the tools that an end user needs in order to exploit the functionalities of a satellite ...
Geri, Walter, Shebshaevich, Boris V., ZANZI, MATTEO   +2 more
core   +3 more sources

Navigation for Satellites

2016
Navigation is a main challenge for the operation of an autonomous satellite. This paper deals with the problem of pose estimation for real-time vision based navigation system. Presented method is able to estimate the target pose with high accuracy and does not require any landmark on the object. The results of numerical simulation were presented.
Mariusz Jacewicz, Robert Glebocki
openaire   +2 more sources

Satellite Navigation

Aircraft Engineering and Aerospace Technology, 1991
AT the 1991 International Conference of the Royal Institute of Navigation the opening address was by Olaf Lundberg, director general of Inmarsat and many civil and military specialists presented papers on a variety of topics relating to satellite navigation for land, sea and air purposes.
openaire   +1 more source

A Virtual Laboratory on satellite-based navigation

Control Engineering Practice, 2001
A primary objective in the development of a navigation system is to test the effectiveness of its algorithms together with their capability of operating in real time. With this in mind a Virtual Laboratory capable of simulating the main features of general aviation aircraft navigational sensors together with their interface to the on-board computer has
BERTONI, GIANNI, CRISCI, MASSIMO, DAGA, LEONARDO, MIRRI, ALESSANDRO   +3 more
openaire   +1 more source

Navigation Satellite Constellations and Navigation Signals

2021
Ground-based radio navigation had been used for more than half a century before the first GPS satellite was launched in the late 1970s. Many radio navigation systems have been developed and put into use since the early of 20th century, including Telefunken Kompass Sender (radio direction finder), Decca (Decca Navigator System), (VOR) VHF ...
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Satellite-Based Navigation Systems

2012
This chapter focuses on various satellite-based navigation systems. The most well-known and widespread system currently used for localization of a radio-receiving terminal is the global positioning system (GPS). All GPS satellites share the same frequency bands, making use of the code division multiple access (CDMA) technique. The transmitted signal on
Bacci G., Falletti E., Fernandez-Prades C., Luise M., Margaria D., Zanier F.   +5 more
openaire   +3 more sources