Results 11 to 20 of about 212,842 (307)
Laser Ranging Bathymetry Using a Photon-Number-Resolving Detector
Remote Sensing, 2022 The sensitivity and robustness against background noise of optical measurements, and specifically range-finding, can be improved by detecting the light with photon-number-resolving detectors (PNRD).
Lior Cohen +4 more
doaj +1 more source
Comparing GRACE-FO KBR and LRI Ranging Data with Focus on Carrier Frequency Variations
Remote Sensing, 2022 The GRACE Follow-On satellite mission measures distance variations between its two satellites in order to derive monthly gravity field maps, indicating mass variability on Earth on a scale of a few 100 km originating from hydrology, seismology ...
Vitali Müller +6 more
doaj +1 more source
100 kHz satellite laser ranging demonstration at Matera Laser Ranging Observatory [PDF]
Journal of Geodesy, 2021 AbstractThe new challenges related to the monitoring of Earth’s shape and motion have led the global geodetic observing system to set more stringent requirements on the precision and stability of the terrestrial reference frame (TRF). The achievement of this ambitious goal depends on the improvement of space geodesy techniques, satellite laser ranging (
Daniele Dequal +9 more
openaire +1 more source
Study on the Preliminary Design of ARGO-M Operation System [PDF]
Journal of Astronomy and Space Sciences, 2010 Korea Astronomy and Space Science Institute has been developing one mobile satellite laser ranging system named as accurate ranging system for geodetic observation-mobile (ARGO-M). Preliminary design of ARGO-M operation system (AOS) which is one of the
Yoon-Kyung Seo +6 more
doaj +1 more source
Multi-frequency Phase Laser Ranging based on Delta-Sigma Modulation
Guangtongxin yanjiu, 2022 In order to solve the problem that the laser satellite terminal can realize the ranging function while completing the communication function, this paper designs a method based on the Delta-Sigma modulation to realize the laser phase ranging, which can ...
Jin-xin ZUO +6 more
doaj +3 more sources
Applied Sciences, 2022 Short and medium-span bridges account for more than 90% of the bridges in China, and it is not suitable to use conventional health monitoring technology to monitor them.
Xiaoya Li, Fangyuan Li
doaj +1 more source
A Tutorial on Retroreflectors and Arrays Used in Satellite and Lunar Laser Ranging
Photonics, 2023 The present paper discusses the basics of retroreflector theory and the manner in which they are combined in arrays to service the laser tracking of artificial satellites and the Moon.
John J. Degnan
doaj +1 more source
2008 American Control Conference, 2008 We present an approach to laser range scanning in which quality metrics are used to automatically reduce the number of measurements acquired from a scanner viewpoint. As part of this approach we present improved versions of the orientation and reflectivity quality metrics, as well as introduce two quality metrics: resolvability and planarity.
MacKinnon, David +2 more
openaire +2 more sources
LASER RANGING MODELING UNDER GENERALIZED MIXED PIXELS EFFECT [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 When a target lies on discontinuous surfaces, the footprint of a laser rangefinder covering multiple ranges causes mixed pixels effect and significantly distorts the ranging quality.
C. M. Chang, J. J. Jaw
doaj +1 more source
Defence Science Journal, 2007 This paper presents the design aspects of laser range finders and proximity sensors beingdeveloped at IRDE for different applications. The principle used in most of the laser rangefinders is pulse echo or time-of-flight measurement. Optical triangulation is used in proximitysensors while techniques like phase detection and interferometry are employed ...
K.C. Bahuguna +3 more
openaire +1 more source