發(fā)布時(shí)間：2018-04-12 12:08

  本文選題：Slichter模 + 超導(dǎo)重力�。� 參考：《武漢大學(xué)學(xué)報(bào)(信息科學(xué)版)》2016年08期

【摘要】：觀測(cè)地球內(nèi)核平動(dòng)振蕩Slichter模有助于約束地球內(nèi)部結(jié)構(gòu),但其探測(cè)仍是國際性難題�；谌蚍植嫉�9個(gè)超導(dǎo)重力(Superconductiug Gravimeter,SG)臺(tái)站的11個(gè)觀測(cè)序列,利用最優(yōu)序列估計(jì)(optimal sequence estimation,OSE)方法進(jìn)行了探測(cè)實(shí)驗(yàn)。首先利用模擬的11個(gè)SG臺(tái)站記錄驗(yàn)證了OSE方法的有效性,然后將OSE方法用于剔除潮汐及氣壓等影響后的實(shí)測(cè)重力殘差數(shù)據(jù),但所得結(jié)果中仍殘留有高階潮波信號(hào)。針對(duì)此,利用解調(diào)過程進(jìn)一步剔除了這些信號(hào),以消除對(duì)目標(biāo)信號(hào)識(shí)別的影響。最終結(jié)果表明,沒有發(fā)現(xiàn)Smylie于1992年發(fā)表論文中所聲稱的觀測(cè)結(jié)果,但找到了另外一組滿足分裂規(guī)律的可能信號(hào),其周期分別為4.310±5.7×10-3 h(m=-1)、3.914±6.4×10-3 h(m=0)和3.642±5.1×10-3 h(m=+1)。該組信號(hào)很可能是Slichter模三重分裂信號(hào),但仍需進(jìn)一步驗(yàn)證。
[Abstract]:The observation of the translational oscillation Slichter mode in the earth's core is helpful to constrain the internal structure of the earth, but its detection is still an international problem.Based on the 11 observation sequences of 9 superconducting gravity stations distributed globally, the optimal sequence estimation (ose) method is used to carry out the detection experiments.The validity of the OSE method is verified by 11 simulated SG stations, and then the OSE method is applied to the measured gravity residuals after the tidal and atmospheric pressure are excluded. However, there are still high order tidal wave signals in the obtained results.In order to eliminate the influence on target signal recognition, the demodulation process is used to further eliminate these signals.It is very likely that the set of signals is a Slichter mode triple splitting signal, but further verification is needed.
【作者單位】： 武漢大學(xué)測(cè)繪學(xué)院;地球空間環(huán)境與大地測(cè)量教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(41174011,41574007) 國家973計(jì)劃(2013CB733305)~~
【分類號(hào)】：P315.7
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本文編號(hào)：1739686