Space qualified frequency sources (clocks) for current and future GNSS applications

LA Mallette, J White, P Rochat - IEEE/ION Position, Location …, 2010 - ieeexplore.ieee.org
Accurate and stable frequency reference sources are critical for commercial, navigation,
military and scientific space applications. Several levels of frequency references are suitable …

On constellation design of multi-GNSS radio occultation mission

JC Juang, YF Tsai, CH Chu - Acta Astronautica, 2013 - Elsevier
The FORMOSAT-3/COSMIC mission which is a joint Taiwan-US mission for meteorological,
climatological, ionospheric, and geodetic studies has successfully provided a significant …

Investigation of best satellite–receiver geometry to improve positioning accuracy using GPS and IRNSS combined constellation over Hyderabad region

C Rajasekhar, VBS Srilatha Indira Dutt… - Wireless Personal …, 2016 - Springer
GPS combined with IRNSS is an emerging Navigation system in India. The combined
system is useful to improve the positioning accuracy of user/receiver on or above the earth …

Optimization of geosynchronous satellite constellation for independent regional navigation and positioning in Middle East region

M Asgarimehr, MM Hossainali - Acta Astronautica, 2014 - Elsevier
Regional Navigation and positioning systems using geosynchronous satellites are emerging
for different parts of the world. Optimal constellation geometry achievement for a set of …

An introduction to satellite based atomic frequency standards

LA Mallette, P Rochat, J White - 2008 IEEE Aerospace …, 2008 - ieeexplore.ieee.org
A major part of satellite based navigation systems is the atomic frequency standard (AFS).
The first satellite navigation was realized in the 1960's, with the US Navy's navigation …

The “system of systems” receiver: An Australian opportunity?

AG Dempster, S Hewitson - IGNSS2007, 2007 - unsworks.unsw.edu.au
In the near future, there could be as many as four global navigation satellite systems (GNSS)
and three regional navigation satellite systems (RNSS). This paper examines the visibility of …

[HTML][HTML] GDoP estimation using Simulated Annealing for GPS and IRNSS combined constellation

CR Sekhar, VBSSI Dutt, GS Rao - Engineering Science and Technology, an …, 2016 - Elsevier
Abstract The Indian Space Research Organization (ISRO) has designed and developed
regional navigation system called Indian Regional Navigational Satellite System (IRNSS), to …

[PDF][PDF] Impact of RNSSs on positioning in the Asia-Oceania region

B Li, S Zhang, AG Dempster… - Journal of Global …, 2011 - researchgate.net
Abstract Regional Navigation Satellite Systems (RNSS) are being developed by Asian
countries. The Asia-Oceania region becomes a hotspot that the maximum number of …

[图书][B] Integration of satellite positioning and a track database for safety-critical railway control systems

Y Zheng - 2007 - search.proquest.com
Abstract Although Global Navigation Satellite Systems (GNSS) have been widely used in
aviation, vehicle and marine navigation, and have also found non-safety railway …

Historical Review of Atomic Frequency Standards Used in Satellite Based Navigation Systems

LA Mallette, P Rochat, J White - Proceedings of the 63rd Annual Meeting of …, 2007 - ion.org
A major part of satellite based navigation systems is the atomic frequency standard (AFS).
The first satellite navigation was realized in the 1960's, with the US Navy's Navigation …