True Azimuth Transfer and Check between Indoor and Outdoor
DENG Xiang-rui1,FAN Bai-xing2,LI Jian-shuang1,LI Lian-fu1
1. National Institute of Metrology, Beijing, 100029, China;
2. Institute of Surveying and Mapping, Information Engineering University, Zhengzhou, Henan 450052, China
Abstract：True azimuth is the key value to achieve traceability and verification of north-finder instrument, it must be ensured accurate and reliable.Astronomical azimuth calibration equipment is designed, which includes outdoor and indoor astronomical reference benchmark (consisting of two collimators and two flat mirrors).Considering the transfer and check of astronomical azimuth between indoor and outdoor, the specific methods are put forward to solution the metrology problem.
2014, Vol. 35 
