Optics and Precision Engineering, Volume. 27, Issue 11, 2321(2019)

Measurement and calibration of optical axis changes for multi-function astronomical theodolite

ZHANG Zhen-jun1...2,*, WANG Jian-cheng1,2,3, CHENG Xiang-ming1,2,3, ZHANG Yi-gong1,2,3, and MAO Wei13 |Show fewer author(s)
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • show less

    Telescopic Optical Axis Change (OAC) is the main source of systematic errors in astrometry. Real-time determination and calibration of OAC are the foundation for obtaining high-quality astrometric data. The determination and analysis of the influence of OAC on time and latitude measurements should be performed to meet the requirements of high-quality astrometric results. First, the influence of OAC on time and latitude measurements were analyzed. The method of determining OAC for multifunction astronomical theodolite was introduced. Then, we determined the OAC in real time and analyzed the results. The experimental results indicate that the influence of OAC on latitude measurement can reach to 2.5" when the zenith distance is 55°. The precision of latitude measurement can reach 0.36" from 1.37" after the calibration of OCA. The precision of time measurement can reach 0.023 s from 0.033 s after the calibration of OCA. The precision of latitude and time measurements significantly improved and can satisfy the requirements of high-quality astrometry after the measurement and calibration of OAC in real time.

    Tools

    Get Citation

    Copy Citation Text

    ZHANG Zhen-jun, WANG Jian-cheng, CHENG Xiang-ming, ZHANG Yi-gong, MAO Wei. Measurement and calibration of optical axis changes for multi-function astronomical theodolite[J]. Optics and Precision Engineering, 2019, 27(11): 2321

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Apr. 12, 2019

    Accepted: --

    Published Online: Jan. 7, 2020

    The Author Email: Zhen-jun ZHANG (zjzhang@ynao.ac.cn)

    DOI:10.3788/ope.20192711.2321

    Topics