Results 341 to 350 of about 1,219,894 (381)
Some of the next articles are maybe not open access.
2003
A short remark on the terminology is given to avoid misinterpretation. “Satellite-based navigation” means navigation based on satellites, i.e., using signals transmitted by satellites. Quite often, this full nomenclature is shortened to the expression “satellite navigation”.
Klaus Christian Legat +2 more
openaire +2 more sources
A short remark on the terminology is given to avoid misinterpretation. “Satellite-based navigation” means navigation based on satellites, i.e., using signals transmitted by satellites. Quite often, this full nomenclature is shortened to the expression “satellite navigation”.
Klaus Christian Legat +2 more
openaire +2 more sources
Use of satellites for navigation
IEEE Transactions on Aerospace and Electronic Systems, 1968Any position on earth can be determined as the intersection of two circles, with their centers located at 0 and 0' on the earth's surface just beneath two satellites. Therefore any flying path can be described as a locus of many such positions. One synchronous satellite can cover 45 percent of the surface of the earth.
openaire +2 more sources
Navigation Satellite Constellations and Navigation Signals
2021Ground-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 ...
openaire +2 more sources
Professional Geographer, 2018
This article examined long-term effects of using navigation tools on wayfinding and spatial orientation, through a survey analysis of the experience of using navigation tools and spatial aptitudes, and a behavioral experiment of real-world navigation ...
T. Ishikawa
semanticscholar +1 more source
This article examined long-term effects of using navigation tools on wayfinding and spatial orientation, through a survey analysis of the experience of using navigation tools and spatial aptitudes, and a behavioral experiment of real-world navigation ...
T. Ishikawa
semanticscholar +1 more source
Effects on satellite navigation
2007Space weather phenomena may have a significant impact on GNSS signals. Fortunately, the GNSS technique itself provides a unique opportunity to monitor ionospheric key parameters continuously on regional and/or global scales in near-real-time which may provide ionospheric corrections in augment navigation and positioning networks.
B. Arbesser-Rastburg, Norbert Jakowski
openaire +2 more sources
Satellite-Based Navigation Systems
2012This 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. +5 more
openaire +3 more sources
Introduction to Satellite Navigation Systems
2013The “youngest” of the major satellite applications is the field of satellite navigation. This field of measurement and ranging through the use of satellite positioning systems first started in the context of scientific research. This initial use of satellites was simply for positioning and location.
Joseph N. Pelton, Sergio Camacho-Lara
openaire +2 more sources
IETE Journal of Research, 1973
In this review paper the basic requirements and configuration of a typical Satellite Navigation System are outlined. Various techniques such as measurement of angle, range and range rate for position fixing applications are discussed in detail. The orbits employed and the frequency ranges appropriate to each technique are considered.
openaire +2 more sources
In this review paper the basic requirements and configuration of a typical Satellite Navigation System are outlined. Various techniques such as measurement of angle, range and range rate for position fixing applications are discussed in detail. The orbits employed and the frequency ranges appropriate to each technique are considered.
openaire +2 more sources
Satellite Navigation for Helicopters
Aircraft Engineering and Aerospace Technology, 1980The Department of Defence of the United States is in the process of implementing a satellite‐based navigation system called Navstar GPS (Global Positioning System). This system will have 24 satellites orbiting in three different orbits, with 8 satellites in each. Full implementation is planned for the mid to late 1980s. Partial use of the system should
openaire +2 more sources
A Virtual Laboratory on satellite-based navigation
Control Engineering Practice, 2001A 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 +3 more
openaire +2 more sources