منابع مشابه
Estimation of Nutation Terms Using Gps
Satellite space-geodetic measurements have been used since a long time to determine UT1UTC rates (or length of day values). The estimation of nutation rates (in longitude and obliquity), however, was thought to be reserved to VLBI and LLR. It can be shown, that there is no fundamental difference between the estimation of UT1-UTC rates and nutation rates. Significant contributions to nutation by...
متن کاملContributions of Tidal Poisson Terms in the Theory of the Nutation of a Nonrigid Earth
The tidal potential generated by bodies in the solar system contains Poisson terms, i.e., periodic terms with linearly time-dependent amplitudes. The influence of these terms in the Earth’s rotation, although expected to be small, could be of interest in the present context of high accuracy modelling. We have studied their contribution in the rotation of a non rigid Earth with elastic mantle an...
متن کاملa synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
15 صفحه اولthe effect of task complexity on efl learners’ written task performance in terms of accuracy and complexity
هدف اصلی این تحقیق بررسی تاثیر افزایش میزان پیچیدگی تکالیف مکالمه محور بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 15 الی 18 سال درسطح pre-intermediate از طریق petو vhs تست به عنوان شرکت کنندگان در تحقیق انتخاب شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی دو تکلیف ساده و پیچیده را طی 2 جلسه انجام...
VISCOUS NUTATION DAMPER, MODELING AND ANALYSIS
In some aerospace vehicles, the tracking sensors which act in a tracking loop as stabilizer are mounted on a two degree of freedom gyro. The gyro must align its rotor axis with the line of sight in order to remove tracking errors. The tracking precision and sensitivity are functions of the gyros performance. One of the main factors in reducing the precision and producing instabilities is nutati...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1980
ISSN: 0074-1809
DOI: 10.1017/s0074180900031764