Against the big error of heightdetermination for the reentry vehicle because of the information provided by low precision geomagnetic sensor, a novel real-time prediction method is proposed.
The determination of the height of the transmissive fracture belt has been a key point for underwater coal mining. There are no precise methods and major research methods up to the present.
导水裂隙带高度的确定是水下采煤工作之重点，目前并没有一个完全可以精确确定的方法。
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The determination of damage height of superincumbent stratum of goaf has immense meaning for safety and reasonable exploitation of coal seam under water body, building and railway.