ADCP内置罗经受外部磁场影响,导致测验精度降低,而GPS罗经具有不受磁场分布影响、不受速度和纬度影响、没有累积误差等优点。通过在感潮河段进行圆检验、正交断面走航测验,分别采用ADCP内置罗经与GPS罗经对测验精度进行分析对比,结果表明GPS罗经有效提高了测验精度。 更多还原
【Abstract】 External magnetic field influences internal compass of ADCP that brings on depressing precision of discharge measurement.GPS compass is provided with strongpoint of which is without infection of magnetic field,speed,latitude and cumulation error ect.Discharge measurement was done by aerial surveying rounded and crossed along using internal compass and GPS compass.Result indicates that discharge measurement is improving by using GPS compass. 更多还原