CSEL provides military personnel with precise geo-positioning information and secure, over-the-horizon (OTH) and line-of-sight (LOS) two-way data communications capabilities.
“作战幸存者/逃逸者定位器”为军事人员提供精确的地理定位信息和安全,超视距(OTH)和视距(LOS)双向数据通信能力。
Remote-sensing technique(RS)combined with global positioning system(GPS)and geo-graphic information system(GIS)is currently an advanced method in the world to investigate soil erosion.
用遥感技术,结合全球定位系统、地理信息系统进行水土流失调查是目前国际上比较先进的方法。
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