共查询到10条相似文献，搜索用时 187 毫秒
1.
对重力卫星微加速度计位移检测电路的输入输出关系进行了详尽的推导,对各种噪声进行了分析,并选取一组典型参数计算了具体数值。发现在所有位移噪声中,电阻的热噪声处于主导地位,而运算放大器的电压和电流噪声可以忽略。电阻的热噪声包含桥路电阻的热噪声和反馈电阻的热噪声。反馈电阻的热噪声可以通过减小反馈电容而减小．桥路电阻的热噪声则与反馈电容无关。位移检测电路的设计所能达到的最好水平是使其噪声处于桥路电阻的热噪声的水平。而桥路电阻的热噪声与探头结构参数、激励电压、温度和差动变压器品质因数等有关。 相似文献
2.
A novel sensor for ocean electric field testing has been fabricated by polyacrylonitrile-based on carbon fibers with electro-chemical oxidation.The surface profile characteristics of the carbon fibers were characterized by scanning electron microscope,Fourier transform infrared spectra and contact angle.Cyclic voltammetry and Tafel curves have been used to study its electro-chemical performances.Two identical electrodes in sea water as the electric field sensor will swiftly respond to applied electric field which causes positive and negative ions to move in opposite direction,resulting in a electric potential difference(ΔE).Test result indicates that the offset potential is typically below 1 m V with a drift of 60-170μVd^-1.Typical self noise level is 1.07 nV√Hz1/2@1 Hz.The electric field response indicates that the modified electrode pair shows better response to AC sine signal of amplitude and frequency(5 mV and 1 mHz)respectively than its blank.The electric field response model of the modified electrodes is creatively presented according to its electric double layer capacitance and Faraday pseudo-capacitance.Many advantages of the carbon fiber electric field electrode will make it have potential application prospect. 相似文献
3.
????????????????GOCE??????????????? L1b????????????????????????????????????????????????????????????????????????飬δ?????????????????????????????????????????????????????????? 相似文献
4.
?о?????GPS??????????λ??????????????????????????????????????????????????????????GPS????α?????????????????????????GPS???λ????????????????????????????￡???????GPS???λ?????????????????????????????????????????????????????????? 相似文献
5.
欧阳祖熙 《大地测量与地球动力学》2013,33(1):153-156
?????RZB??????????????????????????????????????????????в?????????????????????????????????????λ?????????????????λ??????????????RZB??????????????????????????????е????????????????????????????????淶??????????????????λ????????????REMA??????????????????λ???????????????????????????????????????±?????????????????? 相似文献
6.
GOCE���������ݶȲ�������������ģ���о� 总被引：5，自引：2，他引：3
????GOCE?????????????????????????????????????AR??????????????PSD?????????????????????????????У?????AR??????????????????????????????????????????????????????????????PSD????????????????????????У???????????????ж????PSD????????PSD???????????AR??????????GOCE???????????????????????????????Ч??? 相似文献
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?????????????????????????????????????????????????????Σ??о????й????????????????????????????????????????????仯??????????????????????????????????????????????????????????????仯??????????????廷???????????????????????????κ???????????????????????????????????????????????????????????????????????????? 相似文献
8.
��������̽�⼼��������������о� 总被引：34，自引：23，他引：11
宁津生 《大地测量与地球动力学》2002,22(1):1-5
????????????????￡??????????????????????????4??????????????????????????????y???????????????????????????????????????о??????????????????????????? 相似文献
9.
分析了布格重力异常在地壳构造探测中的重要作用,以及目前地质和物探中常用的地面重力测量计算得到的布格重力异常的缺点,提出利用纯重力卫星数据计算得到的SST (satellite-to-satellite tracking)地球重力场模型来研究地质构造和资源探测,以重力场模型EIGEN-GRACE02S为例,分析了其优点和应用的可行性.针对原有"卫星重力异常"概念的缺陷,提出了"真卫星重力异常"和"假卫星重力异常的概念". 相似文献
10.
????????????????????????????С??????????????????????????????????????????????????η??????????????????????????????ε???Ч?????????????庣???T/P???????????????Beta-5?????????????????????????÷????????????????????????????κ???????K??? 相似文献