The precision of airborne gravimetry under the condition of long baselines
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摘要: 针对中远海域航空重力测量过程中由于不易架设GPS基站而导致基线较长的实际,根据航空重力测量原理,基于实际测量数据分析了长基线对航空重力测量精度的影响。综合分析长基线对差分定位精度的影响并结合航空重力异常内符合精度评价,相较于航空重力测量所要求的精度,认为长基线(600~800 km)对航空重力测量精度影响有限且几乎可以忽略不计,为进一步开展中远海域航空重力测量提供了技术支撑。Abstract: It is difficult to set up GPS base stations for airborne gravimetry in offshore and far seas, leading to long baselines. Given this, this study analyzed the impacts of long baselines on the precision of airborne gravimetry based on the principle of airborne gravimetry and the real measurement data. Moreover, this study comprehensively analyzed the effects of long baselines on differential positioning precision and evaluated the internal coincidence precision of airborne gravity anomaly. Compared to the precision required for airborne gravimetry, it is believed that long baselines (600-800 km) have limited and almost negligible impacts on the precision of airborne gravimetry. This study can provide technical support for further development of airborne gravimetry in offshore and far seas.
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Key words:
- airborne gravimetry /
- long baseline /
- internal coincidence precision
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