CARRIER PHASE AMBIGUITY RESOLUTION FOR THE GLOBAL POSITIONING SYSTEM APPLIED TO GEODETIC BASELINES UP TO 2000 KM
CARRIER PHASE AMBIGUITY RESOLUTION FOR THE GLOBAL POSITIONING SYSTEM APPLIED TO GEODETIC BASELINES UP TO 2000 KM
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DOI：
10.1029/jb094ib08p10187
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发表时间：
1989-08-10
期刊：
影响因子：
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通讯作者：
BLEWITT, G
中科院分区：
文献类型：
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作者：
BLEWITT, G
全球定位系统（GPS）载波相位数据有整数个周期的偏差。已经开发并证明了一种成功的策略，用于解决长度达2000 km的大地测量基线的这些整周模糊度，从而使基线精度提高3倍，并与美国西部的超长基线干涉测量推断的坐标保持厘米级一致。对于这个实验，使用伪距数据的方法被证明是更可靠的比一个使用电离层的基线长度超过200公里的约束。一种自动算法利用GPS接收机网络的许多相位偏差之间的相关性，以便能够解决非常长的基线的模糊度。已经开发了一种称为偏差优化的方法，与传统的偏差固定不同，该方法不需要任意的置信度测试。对于配置不佳的网络，偏置优化预计比偏置固定更可取。为了能够对长基线进行模糊度解算，建议未来的GPS网络具有从1000 km到1000 km的宽范围基线长度<100 to >，并使用能够获取双频Pcode数据的GPS接收机。
The Global Positioning System (GPS) carrier phase data are biased by an integer number of cycles. A successful strategy has been developed and demonstrated for resolving these integer ambiguities for geodetic baselines of up to 2000 km in length, resulting in a factor of 3 improvement in baseline accuracy, and giving centimeter‐level agreement with coordinates inferred by very long baseline interferometry in the western United States. For this experiment, a method using pseudorange data is shown to be more reliable than one using ionospheric constraints for baselines longer than 200 km. An automated algorithm exploits the correlations between the many phase biases of a GPS receiver network to enable the resolution of ambiguities for very long baselines. A method called bias optimizing has been developed, which, unlike traditional bias fixing, does not require an arbitrary confidence test. Bias optimizing is expected to be preferable to bias fixing for poorly configured networks. In order to enable ambiguity resolution for long baselines, it is recommended that future GPS networks have a wide spectrum of baseline lengths ranging from <100 to >1000 km and that GPS receivers be used which can acquire dual‐frequencyPcode data.