Time and laser ranging: a window of opportunity for geodesy, navigation, and metrology
نویسندگان
چکیده
منابع مشابه
Potential Capabilities of Lunar Laser Ranging for Geodesy and Relativity
Lunar Laser Ranging (LLR), which has been carried out for more than 35 years, is used to determine many parameters within the Earth-Moon system. This includes coordinates of terrestrial ranging stations and that of lunar retro-reflectors, as well as lunar orbit, gravity field, and its tidal acceleration. LLR data analysis also performs a number of gravitational physics experiments such as test ...
متن کاملthe innovation of a statistical model to estimate dependable rainfall (dr) and develop it for determination and classification of drought and wet years of iran
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
15 صفحه اولLunar Laser Ranging Contributions to Relativity and Geodesy
Lunar laser ranging (LLR) is used to conduct high-precision measurements of ranges between an observatory on Earth and a laser retro-reflector on the lunar surface. Over the years, LLR has benefited from a number of improvements both in observing technology and data modeling, which led to the current accuracy of post-fit residuals of ∼ 2 cm. Today LLR is a primary technique to study the dynamic...
متن کاملLocal Geodesy by Satellite Laser Ranging: a European Solution
Errors in the modelling the satellite orbit have so far limited the accuracy in the processing of Satellite Laser Ranging (SLR) data. A new method is proposed to achieve a residual size consistent with the observational errors, and a stability of the geode-tic network coordinates at the same level. The orbit of the geodetic satellite LAGEOS is decomposed into very short arcs (less than half orb...
متن کاملCOVID-19: A Window of Opportunity for Positive Healthcare Reforms
The current coronavirus disease 2019 (COVID-19) pandemic is testing healthcare systems like never before and all efforts are now being put into controlling the COVID-19 crisis. We witness increasing morbidity, delivery systems that sometimes are on the brink of collapse, and some shameless rent seeking. However, besides all the challenges, there are also possibilities t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geodesy
سال: 2018
ISSN: 0949-7714,1432-1394
DOI: 10.1007/s00190-018-1173-8