Search results for "satellite laser ranging"

showing 3 items of 3 documents

Drift of the Earth’s Principal Axes of Inertia from GRACE and Satellite Laser Ranging Data

2020

The location of the Earth’s principal axes of inertia is a foundation for all the theories and solutions of its rotation, and thus has a broad effect on many fields, including astronomy, geodesy, and satellite-based positioning and navigation systems. That location is determined by the second-degree Stokes coefficients of the geopotential. Accurate solutions for those coefficients were limited to the stationary case for many years, but the situation improved with the accomplishment of Gravity Recovery and Climate Experiment (GRACE), and nowadays several solutions for the time-varying geopotential have been derived based on gravity and satellite laser ranging data, with time resolutions reac…

Satellite Laser RangingPrincipal axes of inertiagracesatellite laser rangingScienceEarth rotationQMatemática Aplicadaprincipal axes of inertiaearth rotationGRACEEarth gravity missionPhysics::Space Physicsearth gravity missionddc:550
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Field tests of astrometric subsystem

2016

The paper presents results of astrometric subsystem’s functionality tests for space object laser ranging and astrometric position determination device, which is under construction in the Institute of Geodesy and Geoinformatics (GGI) of the University of Latvia. Properties of hardware performance for astrometric image acquisition were evaluated and optimal parameters have been selected. Software for image processing and calculation of instrument orientation was tested and adjustments have been made for real-time operation support. Object tracking properties were evaluated, and mount error model parameters were calculated, using test measurements.

0301 basic medicineQB275-343satellite geodesySatellite geodesybusiness.industryOrientation (computer vision)satellite laser rangingSatellite laser rangingImage processingimage processing03 medical and health sciences030104 developmental biologyGeographySoftwareGeoinformaticsgeodetic astronomyVideo trackingGeneral Earth and Planetary SciencesComputer visionArtificial intelligencebusinessGeodetic astronomyGeodesyRemote sensingGeodesy and Cartography
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Photon Pressure Force on Space Debris TOPEX/Poseidon Measured by Satellite Laser Ranging

2017

The TOPEX/Poseidon (T/P) altimetry mission operated for 13 years before the satellite was decommissioned in January 2006, becoming a large space debris object at an altitude of 1,340 km. Since the end of the mission, the interaction of T/P with the space environment has driven the satellite's spin dynamics. Satellite Laser Ranging (SLR) measurements collected from June 2014 until October 2016 allow for the satellite spin axis orientation to be determined with an accuracy of 1.7°. The spin axis coincides with the platform yaw axis (formerly pointing in the nadir direction) about which the body rotates in a counterclockwise direction. The combined photometric and SLR data collected over the 1…

PhysicsPhoton010504 meteorology & atmospheric sciencesSatellite laser rangingEnvironmental Science (miscellaneous)Geodesy01 natural sciencesRotational energyPhotometry (optics)Radiation pressure0103 physical sciencesGeneral Earth and Planetary SciencesAltimeter010303 astronomy & astrophysics0105 earth and related environmental sciencesSpace environmentRemote sensingSpace debrisEarth and Space Science
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