Results 241 to 250 of about 2,642,880 (286)

Pushing the boundaries of robotic computed tomography: automated twin-robot CT scan with maximum reachability. [PDF]

Sci Rep
Schnitzer J, Sathyanarayana Raju VR, Erdebil NE, Herl G, Maier A.   +4 more
europepmc   +1 more source

Persistence-Weighted Performance Metric for PID Gain Optimization in Optical Tracking of Unknown Space Objects. [PDF]

Sensors (Basel)
Hyun C, Kim D, Kim H, Park S.
europepmc   +1 more source

Fluorescein spectrofluorometric quenching detection of chloride and iodide using eight-Blue-LEDs excitation and dual solar cells. [PDF]

Sci Rep
Allawi GK, Turkey NS.
europepmc   +1 more source

Sentinel-1A – First precise orbit determination results [PDF]

Advances in Space Research, 2017
Sentinel-1A is the first satellite of the European Copernicus programme. Equipped with a Synthetic Aperture Radar (SAR) instrument the satellite was launched on April 3, 2014. Operational since October 2014 the satellite delivers valuable data for more than two years. The orbit accuracy requirements are given as 5 cm in 3D.
Stefan Hackel, Urs Hugentobler, Daniel Arnold   +2 more
exaly   +7 more sources

Precise orbit determination of Spire nano satellites [PDF]

Advances in Space Research, 2023
Spire Global, Inc. operates a growing fleet of currently more than 100 CubeSats in different low Earth orbits for commercial Earth observation. These satellites are equipped with dual-frequency GPS receivers and an attitude determination and control ...
Heike Peter, Adrian Jaggi, Daniel Arnold
exaly   +4 more sources

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Precise Orbit Determination for NavIC Satellites

2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2021
Precise Orbit Determination (POD) is an important process for navigation applications like Precise Point Positioning (PPP) and Real Time Kinematics (RTK). Earlier researchers have carried out extensive research for GNSS constellations placed in Medium Earth Orbits (MEO) having dynamic behaviour different from Geo-Synchronous Orbits (GSO) satellites. In
B.N. Ramakrishana, Ganesh T Subramanya, P.D. Mishra, Anu Arora, Sharda Vashisth, Amitava Sen Gupta   +5 more
openaire   +1 more source

Simulation of precise orbit determination of lunar orbiters

Chinese Astronomy and Astrophysics, 2005
Abstract Based on the ongoing Chinese lunar exploration mission, i.e. the “Chang'e 1” project, precise orbit determination of lunar orbiters is analyzed for the actual geographical distribution and observational accuracy of the Chinese united S-band (USB) observation and control network as well as the very long baseline interferometry (VLBI) tracking
Xiao-gong Hu, Cheng Huang, Yong Huang
openaire   +1 more source

Precision orbit determination for Topex

Advances in Space Research, 1990
The ability of radar altimeters to measure the distance from a satellite to the ocean surface with a precision of the order of 2 cm imposes unique requirements for the orbit determination accuracy. The orbit accuracy requirements will be especially demanding for the joint NASA/CNES Ocean Topography Experiment (Topex/Poseidon).
B.D. Tapley, B.E. Schutz, J.C. Ries, C.K. Shum   +3 more
openaire   +1 more source