Results 71 to 80 of about 162,805 (182)

Recognition of objects in orbit and their intentions with space‐borne sub‐THz Inverse Synthetic Aperture Radar

IET Radar, Sonar &Navigation, Volume 18, Issue 4, Page 564-576, April 2024.
The paper describes a processing scheme to extract discriminating features from Inverse Synthetic Aperture Radar images of objects in space and how these discriminators can be used to recognise or to estimate the intention of these objects. It describes how electromagnetic simulation can be used to create images to train the object recognition ...
Mikhail Cherniakov, Edward G. Hoare, Marina Gashinova, Emidio Marchetti, Andrew G. Stove   +4 more
wiley   +1 more source

Orbit Determination of China’s Space Station Using Real ISL Measurements of the Tianzhou‐6 Spacecraft

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
Under most circumstances, the current studies related to precision orbit determination (POD) using intersatellite link (ISL) measurements are limited to ISL ranging components. In this article, we would like to discuss the idea of jointly using the GNSS observations and ISL ranging and orientation measurements of the Tianzhou‐6 (TZ‐6) spacecraft to ...
Haijian Fang, Fan Wang, Xueming Yu, Baohua Wang, Jiasong Wang, Yufan He, Minzhang Han, Dan Wang, Jingqi Huang, Zhiguang Song   +9 more
wiley   +1 more source

Application of GPS tracking techniques to orbit determination for TDRS [PDF]

In this paper, we evaluate two fundamentally different approaches to TDRS orbit determination utilizing Global Positioning System (GPS) technology and GPS-related techniques. In the first, a GPS flight receiver is deployed on the TDRSS spacecraft.
Haines, B. J., Lichten, S. M., Malla, R. P., Wu, S. C.   +3 more
core   +1 more source

TEMPO2, a new pulsar timing package. I: Overview

, 2006
Contemporary pulsar timing experiments have reached a sensitivity level where systematic errors introduced by existing analysis procedures are limiting the achievable science.
Backer, Backer, Bell, Blandford, Damour, Damour, Feissel, Folkner, Foster, Foster, G. B. Hobbs, Guinot, Harada, Hilton, Hobbs, Hobbs, Irwin, Issautier, Jenet, Kopeikin, Kopeikin, Lange, Lieske, Lorimer, Lyne, Lyne, Lyne, Manchester, McCarthy, Petit, Phillips, Press, R. N. Manchester, R. T. Edwards, Ryba, Seiber, Seidelmann, Shapiro, Shklovskii, Spitzer, Splaver, Stairs, Standish, Standish, Taylor, Taylor, van der Swaluw, Wall, Wang, Wex, Wolszczan   +50 more
core   +1 more source

Analysis and Assessment of BDS‐3 Five Single‐Frequency Civilian Signals Single Point Positioning Considering Time Group Delay and Intersignal Correction

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
The BeiDou Global Navigation Satellite System (BDS‐3) has been providing global positioning, navigation, and timing (PNT) services for over 3 years. Single‐frequency single point positioning (SPP) receivers have significant advantages such as low hardware cost and easy implementation, making them widely used in engineering practice.
Xingli Sun, Dakun Sun
wiley   +1 more source

Subnanosecond GPS-based clock synchronization and precision deep-space tracking [PDF]

Interferometric spacecraft tracking is accomplished by the Deep Space Network (DSN) by comparing the arrival time of electromagnetic spacecraft signals at ground antennas separated by baselines on the order of 8000 km. Clock synchronization errors within
Border, J. S., Dunn, C. E., Jefferson, D. C., Lichten, S. M.   +3 more
core   +1 more source

Application of "Galileo High Accuracy Service" on Single-Point Positioning. [PDF]

Sensors (Basel), 2023
Angrisano A, Ascione S, Cappello G, Gioia C, Gaglione S.   +4 more
europepmc   +1 more source

SISRE of BDS-3 MEO: Evolution as Well as Comparison between D1 and B-CNAV (B-CNAV1, B-CNAV2) Navigation Messages

Remote Sensing
The signal-in-space range error (SISRE) has a direct impact on the performance of global navigation satellite systems (GNSSs). It is an important indicator of navigation satellite space server performance.
Zhenghua Dong, Songlin Zhang
doaj   +1 more source

Satellite Emission Range Inferred Earth Survey (SERIES) project [PDF]

The Global Positioning System (GPS) was developed by the Department of Defense primarily for navigation use by the United States Armed Forces. The system will consist of a constellation of 18 operational Navigation Satellite Timing and Ranging (NAVSTAR ...
Buennagel, L. A., Macdoran, P. F., Neilan, R. E., Spitzmesser, D. J., Young, L. E.   +4 more
core   +1 more source

The Implementation of Precise Point Positioning (PPP): A Comprehensive Review. [PDF]

Sensors (Basel), 2023
Elsheikh M, Iqbal U, Noureldin A, Korenberg M.   +3 more
europepmc   +1 more source