This standard specifies the measurement principles, measurement methods and accuracy requirements for determining astronomical longitude, astronomical latitude and astronomical azimuth on land. This standard is applicable to the first, second, third and fourth grade astronomical survey operations. For other survey operations that need to determine astronomical longitude, latitude and azimuth, you can refer to it.
GB/T 17943-2000 history
2000GB/T 17943-2000 Specifications for the geodetic astronomy