نتایج جستجو برای: satellite laser range finding
تعداد نتایج: 1135449 فیلتر نتایج به سال:
the research used the satellite image (landsat 7 etm ) within the thermal infrared sixth band (tir6) and geographic information system (gis) to determine the air pollution and its relationship with the land cover (lc) and land use (lu) of baghdad city. concentration of total suspended particles (tsp), lead (pb), carbon oxides (co, co2), and sulphur dioxide (so2) were obtained from 22 ground mea...
ABSTRACT In this research the effects of low power Ga – As Laser irradiation applied to acupuncture points on subjective symptoms in chronic Lateral epicondylitis were studied. The method of this study was quasi Experimental. Thirty two patiens (age range 22 – 57 years) with clinically diagnosed chronic lateral epicondylitis took part in this study. All referred patients were examined (exclusi...
The Microwave Limb Sounder on the Aura satellite has a radiometer at 2.5 THz to perform global mapping of OH in the atmosphere. The OH radiometer utilizes two Schottky-diode mixers pumped by an optically pumped THz gas laser local oscillator. The laser was first turned on in space on July 22, 2004, and has performed without issue for more than 30 months. The specifications, design, and modeling...
This paper deals with forest inventory methods based on laser scanning and satellite remote sensing. It will be demonstrated to what extent forest inventories can benefit from the synergistic use of both sensor types. The forest inventory parameters to be assessed are: tree height, timber volume, tree species, tree age, stand boundary, and basal area. The results presented are derived from the ...
-We are developing a laser radar (lidar) altimeter that uses commercial off-the-shelf fiber-optic components and traditional RF and digital signal processing techniques to achieve fine-range accuracy despite a low transmit peak power. A 1550-nm operating wavelength was selected so that available erbium-doped fiber amplifiers (EDFAs) could be used to provide optical gain. The transmitted signal,...
Haiyang-2D (HY-2D) is the fourth satellite in marine dynamic series established by China. It was successfully launched on 19 May 2021, marking era of 3-satellite network environment The satellite’s precision orbit determination (POD) and validations are great significance for ocean warning altimetry missions. HY-2D equipped with a laser reflector array (LRA), satellite-borne Doppler Orbitograph...
We report a free space laser communication experiment from the satellite laser ranging (SLR) station at NASA Goddard Space Flight Center (GSFC) to the Lunar Reconnaissance Orbiter (LRO) in lunar orbit through the on board one-way Laser Ranging (LR) receiver. Pseudo random data and sample image files were transmitted to LRO using a 4096-ary pulse position modulation (PPM) signal format. Reed-Sol...
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