نتایج جستجو برای: star tracker
تعداد نتایج: 82749 فیلتر نتایج به سال:
One of the methods for increasing the gain in the photovoltaic systems is using the solar tracker system which during the whole of day, align the solar panels in the proper position with respect to the sun position. In this study, a solar tracker in the form of smart light curtain was designed and prepared. This simple and smart tracker detects the direction of the sun radiation by using three ...
Abstract The discriminative correlation filter (DCF)-based tracking methods have achieved remarkable performance in visual tracking. However, the existing DCF paradigm still suffers from dilemmas such as boundary effect, degradation, and aberrance. To address these problems, we propose a spatio-temporal joint aberrance suppressed regularization (STAR) tracker under unified framework of response...
Abstract Standby mode is the in which space advanced technology demonstration satellite (SATech) stays for a long time when all payloads are not working. This ensures energy supply of on one hand and long-term effectiveness satellite’s star tracker quaternion other hand. Firstly, target guidance law standby designed. Secondly, installation position designed according to characteristics law. Thi...
The star tracker is a prerequisite device to realize high-precision attitude determination for spacecraft. However, due the errors in optical lens machining, path assembly, and temperature alternation, instruments suffer from some amount of geometric distortion, resulting declining accuracy. on-orbit distortion correction images indispensable precise performance. In this paper, novel single-lay...
CMS silicon Tracker alignment consists of three key components: Survey during tracker construction, measurements with the Laser Alignment System during operation and track based alignment. Methods and results are explained in detail, with a special focus on track based alignment due to its enormous complexity and numerical challenges. Presented at Vertex06 – 15th International Workshop On Verte...
چکیده: در گل های شاخه بریده به حداقل رساندن ضایعات پس از برداشت و افزایش عمر ماندگاری با در نظر گرفتن هزینه های بالای تولید امری بسیار مهم و ضروری است به خصوص در مورد گل های شاخه بریده رز که جایگاه خاصی در تجارت گیاهان زینتی دنیا دارند. گل رز از تیره گلسرخیان، با نام علمی rosahybrida می باشد. این تحقیق به منظور بررسی اثرات کاربرد سطوح مختلف نانو ذرات نقره بصورت تیمار مداوم و محلول پاشی در ارق...
Citation STAR Collaboration et al. " Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at [sqrt]sNN=9.2 GeV. " Physical Review C 81.2 (2010): 024911. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made thi...
A satellite’s absolute attitude and angular rate are both important measurements for satellite missions that require navigation. Typically, these measurements have been made by separate sensors, with star cameras being used to determine a satellite’s absolute attitude, and gyroscopes being used as the primary rate sensors. Recently, there have been multiple efforts to measure both of these quan...
GPS is a critical tool often used in terrestrial location and navigation. However, GPS relies on a system of satellites in medium earth orbit and is prone to dropouts at higher latitudes, and may be susceptible to spoofing or other attacks. Thus, it is prudent to examine possible alternatives. Recently, star tracking has been of interest in global positioning. There are many implementations of ...
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