Results 11 to 20 of about 788,278 (206)
Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides [PDF]
NAVIGATION, 2021 The availability of orbit information with high precision and low latency is a key requirement for many Earth-observation missions, predominantly in the field of radio occultation. Traditionally, precise orbit determination solutions of low-Earth orbit (LEO) satellites are obtained offline on ground after downloading GNSS measurements and auxiliary ...
Hauschild, André, Montenbruck, Oliver
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Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides [PDF]
GPS Solutions, 2023 Abstract Over the last decade, chip-scale atomic clocks (CSACs) have emerged as stable time and frequency references with small size, weight, and power (SWaP). While the short-term stability of these devices clearly outperforms other oscillators with similar power consumption, their stability over longer time intervals is notably ...
Kunzi, Florian, Montenbruck, Oliver
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High precision GPS Network with Precise Ephemerides and Earth Body Tide Model
Brazilian Journal of Geophysics, 1997 The permanent GPS network of the International GPS Service for Geodynamics (IGS) provides a global data set of precise GPS measurements, which is invaluable in the development of algorithms and software for very high accuracy GPS positioning ...
J. F. G. Monico, V. Ashkenazi, T. Moore
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Accurate and Rapid Broadcast Ephemerides for Beidou-Maneuvered Satellites [PDF]
Remote Sensing, 2019 The geostationary earth orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites of the Beidou navigation satellite system are maneuvered frequently. The broadcast ephemeris can be interrupted for several hours after the maneuver.
Jing Qiao +3 more
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Precise On-Board Navigation of LEO Satellites with GNSS Broadcast Ephemerides
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2020 The availability of orbit information with high precision and low latency is a key requirement for many Earthobservation missions, predominantly in the field of radio occultation. Traditionally, precise orbit determination solutions of low-Earth orbit (LEO) satellites are done offline on the ground after dwonloading GNSS measurements and required ...
Hauschild, André, Montenbruck, Oliver
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Precision of the ephemerides of outer planetary satellites
Planetary and Space Science, 2010 Abstract Ephemerides of planetary satellites are needed to address many problems. These ephemerides are used for subsequent observations. A comparison of the available ephemerides with new observations allows the accuracy of the former to be assessed. However, the precision of the ephemerides must be known a priori when solving the tasks.
Emelyanov, Nikolai V., Nikolay Emelyanov
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PRECISION EPHEMERIDES FOR GRAVITATIONAL WAVE SEARCHES. II. CYG X-2 [PDF]
The Astrophysical Journal, 2016 ABSTRACT Accreting neutron stars in low-mass X-ray binaries are candidate high-frequency persistent gravitational wave sources. These may be detectable with next-generation interferometers such as Advanced LIGO/VIRGO within this decade. However, the search sensitivity is expected to be limited principally by the uncertainty in the binary
Sammanani S. Premachandra +4 more
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Models for high-precision spacecraft and planetary and lunar ephemerides [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractWe discuss models for high-precision spacecraft and planetary and lunar ephemerides.
E. Myles Standish, James G. Williams
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IEEE Access, 2023 BDS-3 was formally put into service on July 31, 2020, and now along with BDS-2 provides the positioning, navigation and timing services. In this contribution, different techniques of dual-frequency absolute positioning using the fully serviceable BDS-2 ...
Shengnan Liu, Shaolin Zhu, Jian Zhang
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PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013 [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 As BeiDou navigation system has been operational since December 2012. There is an increasing desire to use multiple constellation to improve positioning performance. The signal-in-space (SIS) anomaly caused by the ground control and the space vehicle is
Y. Wu, J. Ren, W. Liu, W. Liu
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