کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1764358 1020052 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrostatic gravity gradiometer design for the future mission
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Electrostatic gravity gradiometer design for the future mission
چکیده انگلیسی

Satellite gravity gradiometry has been applied in GOCE mission to obtain higher harmonics of the Earth’s gravity mapping. In-orbit results showed that the precision of GOCE gradiometry achieved a level of 10–20 mE/Hz1/2 in the bandwidth of 38–100 mHz, and the major error source came from the intrinsic noise of the core sensor electrostatic accelerometer. Two schemes for improving sensitivity of such accelerometer are presented by optimizing the parameters to reduce the dynamic range and choosing the heavier proof mass to suppress the thermal noise limited by the discharging gold wire. As a result, an accelerometer with a better resolution of 6.6×6.6×10−13 m/s2/Hz1/2 could be developed, and then a precision of 3 mE/Hz1/2, corresponding to a spatial resolution of about 78 km half wavelength, is achievable for the future satellite gradiometric mission.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 51, Issue 12, 15 June 2013, Pages 2269–2276
نویسندگان
, , , , ,