A GPS Radio Occultation occurs when a transmitting GPS satellite, setting or rising behind the Earth limb, is viewed by a LEO satellite that carries on board a space-qualified GPS receiver. In this way, it is provided a vertical sounding of the atmosphere exploiting the relative motion between the GPS and the LEO satellites. The technique proved to be particularly precise in retrieving temperat...

International Civil Aviation Organization (ICAO) regulated Visual Aids for Navigation stated on Annex 14 Chapter 5 consist of mandatory item which provides important guidance's piloting the airplane. Presently, system visual aids navigation has been working with Constant Current Regulator (CCR) in its development there are various type at CCR used airport. One is still widely airport today NBF ...

Global navigation satellite systems have been revolutionising surveying, geodesy, navigation and other position/location sensitive disciplines. However, there are two intrinsic shortcomings in such satellite-based positioning systems: signal attenuation and dependence on the geometric distribution of the satellites. Consequently, the system performance can decrease significantly under some hars...

In the coming years, many more satellite positioning signals will become available to civilian users. In addition to the L2 and L5 signals of GPS is the array of different signals that will be broadcast by Galileo. A Galileo receiver will be required to be fully compatible with GPS, so the receiver will need to be sophisticated enough to receive and process all of these signals simultaneously. ...

This paper presents the 1ST RELY project which aims at Integrating Satellite Digital Radio Broadcasting (S-DB), terrestrial cellular technology and EGNOS satellite navigation

As one of the most essential modeling aspects for precise orbit determination, solar radiation pressure (SRP) is the largest non-gravitational force acting on a navigation satellite. This study focuses on SRP modeling of the BeiDou-3 experimental satellite I2-S (PRN C32), for which an obvious modeling deficiency that is related to SRP was formerly identified. The satellite laser ranging (SLR) v...

It is well known that Global Navigation Satellite Systems signals (which include for example the U.S. GPS and its modernization, the Russian GLONASS, the future European Galileo, the Chinese COMPASS), commonly processed for navigation purposes, can also be used to characterize media where they propagate in. In the last decade, GNSS atmospheric and Earth’s surface remote sensing become more and ...