نتایج جستجو برای: satellite laser range finding
تعداد نتایج: 1135449 فیلتر نتایج به سال:
Laser Ranging Experiment on Lunar Reconnaissance Orbiter: Timing Determination and Orbit Constraints
Accurate ranges from Earth to the Lunar Reconnaissance Orbiter (LRO) spacecraft Laser Ranging (LR) system supplement the precision orbit determination (POD) of LRO. LRO is tracked by ten LR stations from the International Laser Ranging Service (ILRS), using H-maser, GPS-steered Rb, and Cs oscillators as reference clocks. The LR system routinely makes oneway range measurements via laser time-of-...
the nervous system has an important and vital role in the human body, but unfortunately the repairment of damaged nervous tissue is very slowly. for a long time, the scientists have been involved in finding ways to speed up this process. radiation of low power he-ne laser has been suggested to as a way to improve this issue. in this study, 20 rats were divided randomly into control and case gro...
هدف: این مطالعه به منظور بررسی و مقایسه اثر q-switched nd yag laser و erbium laser در درمان ضایعات پیگمانته انجام شده است. روش مطالعه: 116 فرد مبتلا به ضایعات پیگمانته از نوع فرکل و خال وارد مطالعه شدند که 58 مورد با استفاده از q-switched nd yag laser و 58 مورد با لیزر erbium درمان شدند و در نهایت میزان اثربخشی (از بین رفتن کامل ضایعات) در دو گروه تعیین و مقایسه گردید. یافته ها: در این مطالعه...
Extending quantum communication to Space environments would enable to perform fundamental experiments on quantum physics as well as applications of quantum information at planetary and interplanetary scales. Here, we report the first experimental implementation of a scheme for single-photon exchange between a satellite and an Earth-based station. We built an experiment that mimics a single phot...
This paper describes a low-cost interactive active monocular range finder and illustrates the effect of introducing interactivity to the range acquisition process. The rangefinder consists of only one camera and a laser pointel; to which three LEDs are attached. When a user scans the laser along s u ~ a c e s ofobjects, the camera captures the image of spots (one from the lasel; and the others ...
Abstract The new challenges related to the monitoring of Earth’s shape and motion have led global geodetic observing system set more stringent requirements on precision stability terrestrial reference frame (TRF). achievement this ambitious goal depends improvement space geodesy techniques, satellite laser ranging (SLR) in particular, being main instrument for TRF realization. In work, we study...
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