However , the accuracy and instantaneity of the most used mark post measurement method are not good and the errors of five - wheel measure device with contacting measurement principle are serious when it is used in soft and undulated surface field 但是,常用的標(biāo)桿法測量精度和瞬態(tài)性較差,接觸式測量的五輪儀法用于田間松軟、不平的地況誤差較大。
Undulate acquisition surface is one of the main properties of the seismic datasets from western china . based on the synthetic source record migration method and wave stack principle , a method of migrating directly from the undulate surface is presented and tested 結(jié)合我國西部地震資料的特點,針對起伏地表情況下的地震數(shù)據(jù)成像問題,提出了與合成震源記錄偏移方法相應(yīng)的成像方法以及基于共聚焦點技術(shù)的基準(zhǔn)面向上校正方法。
Planation surface is a wide - ranging and undulating surface formed by planation in a long and relative stable period or in a decreacing - development period . it is near the base level and there always exists some deposits such as crust of weathering above it . planation surface is often uplifted or buried by the later tectonic activities 夷平面是在長期的地殼相對穩(wěn)定時期或地殼下降發(fā)展階段,由廣泛的夷平作用以截斷面形式橫切所有先成的地層和構(gòu)造的接近侵蝕基準(zhǔn)面的平緩的地表形態(tài),其上常有風(fēng)化殼等碎屑堆積,常遭到后期的抬升切割或埋藏,分布于地球的各緯度帶。