Results 121 to 130 of about 1,106,314 (231)
Search for High-Energy Gamma-ray Emission from an Anomalous X-ray Pulsar, 4U 0142+61
, 2010 Until 2004, Anomalous X-ray Pulsars (AXPs) were known as strong emitters of soft X-rays only (< 10 keV). The discovery of hard X-ray component from AXPs provided important insight about their emission properties while it posed a serious challenge to ...
Atwood +10 more
core +1 more source
Optical Photometry of LMXBs: UW CrB (=MS 1603+260) and V1408 Aql (=4U 1957+115)
Acta Polytechnica CTU Proceedings, 2015 We present new optical observations of V1408 Aql (= 4U 1957+115), the only low mass X-ray binary, black hole candidate known to be in a persistently soft state.
P. A. Mason +3 more
doaj +1 more source
Time synchronization system utilizing moon reflected coded signals Patent [PDF]
, 1969 Time synchronization system for synchronizing clocks at remote locations with master clock using moon reflected coded ...
Easterling, M. F.
core +1 more source
Chinese Astronomy and Astrophysics, 2009 Abstract The satellite-borne GPS receivers dedicated to precise orbit determination are now being carried by more and more low earth orbit (LEO) satellites and the satellite-borne GPS has become one of the main means for the precise orbit determination of low earth orbit satellites.
Dong-ju, P., Bin, W.
openaire +3 more sources
The First Lunar Ranging Constraints on Gravity Sector SME Parameters
, 2007 We present the first constraints on pure-gravity sector Standard-Model Extension (SME) parameters using Lunar Laser Ranging (LLR). LLR measures the round trip travel time of light between the Earth and the Moon.
Battat, James B. R. +2 more
core +1 more source
Beginnings of Satellite Navigation
Kartografija i Geoinformacije, 2008 The first satellite navigation system called the Navy Navigation Satellite System (NNSS) or TRANSIT was planned in the USA in 1958. It consisted of 5-6 artificial Earth satellites, was set in motion for the USA military in 1964, and in 1967 for civilian ...
Miljenko Solarić
doaj
Double precision trajectory program /DPTRAJ 2.2C/ [PDF]
, 1971 Four part program computes trajectory of space probe moving in solar system and subject to variety of ...
Joseph, A. E. +6 more
core +1 more source
Image Positioning Accuracy Analysis for Super Low Altitude Remote Sensing Satellites
International Journal of Advanced Robotic Systems, 2012 Super low altitude remote sensing satellites maintain lower flight altitudes by means of ion propulsion in order to improve image resolution and positioning accuracy.
Ming Xu, Nan Zhou
doaj +1 more source
Utilization CSRS-PPP software for recovery aircraft’s position [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2015 The PPP method is applied in aeronautical navigation as a new technique for determination of aircraft’s position. In this paper preliminary results of recovery aircraft’s position were presented.
Kamil KRASUSKI
doaj
The Navstar GPS master control station's Kalman filter experience [PDF]
The Navstar Global Positioning System (GPS) is a highly accurate space based navigation system providing all weather, 24 hour a day service to both military and civilian users.
Scardera, Michael P.
core +1 more source