SGER: GPS Attitude Sensor Development

限制船载声学多普勒海流剖面仪(ADCP)测量精度的一个主要因素是由陀螺罗经测量的船舶航向的不确定性。ADCP已成为测量移动中的考察船产生的海底流的有力工具。利用带有天线阵列的全球定位系统卫星的载波相位测量，将研究以0.1度量级的精度常规测量船舶的航向、纵摇和横摇的能力。这项研究将包括算法和误差源的分析，以及用于记录和后处理载波相位测量以得出天线阵列姿态的软件的开发。原型系统将在海上短途航行中进行测试，并将用于提高太平洋前三次WOCE水文测量项目的ADCP精度。

A primary factor limiting the accuracy of shipboard Acoustic Doppler Current Profiler (ADCP) measurements is uncertainty in the ship's heading as measured by the gyrocompass. ADCP has become a powerful tool for measuring undersea currents from moving research vessels. Using carrier phase measurements of the Global Positioning System satellites with an array of antennas, the ability to routinely measure ship's heading, pitch, and roll with an accuracy of order 0.1 degrees will be investigated. The study will include analysis of algorithms and error sources, and the development of software for recording and postprocessing the carrier phase measurements to yield the attitude of the antenna array. The prototype system will be tested at sea on short cruises, and will be used to improve ADCP accuracy on the first three WOCE Hydrographic Project cruises in the Pacific.