For astrometric purposes, dark frame and flat field calibration is recommended.
出于天文测量要求，暗场图和平场图校准是被推荐的。
Astrometric Limit: The maximum residual in the place of a reference star, specified in arc seconds.
天文测量误差极限：参考星位置对应的最大误差，用角秒表示。
The accuracy of the future international celestial reference frame obtained from astrometric satellites: SIM and GAIA are given.
介绍由天体测量卫星GAIA和SIM给出的天球参考架可能逵到的精度。
If you save the images after astrometric data reduction has been performed, the software will add WCS keywords to the FITS header.
如果你的图片经过天文测量数据分类转换后储存，本软件将在FITS文件头部分添加wcs关键词。
Some ordinary forms of sparse matrix and the application of sparse matrix technology in astrometric and geodetic VLBI data analysis are introduced.
介绍了稀疏矩阵的四种常见形式以及稀疏矩阵技术在天测与测地VLBI数据处理中的应用。
Pressing the [OK] button will start the astrometric data reduction process. After a while, colored circles will be drawn around the objects detected by the software.
点OK后，天文数据分类将会开始，过一会儿，软件识别后的结果就会以彩色圈的形式显示出来。
The Problem of astrometric photometry is discussed in this paper. The photometric capabilities on both the ground-based astrometric instruments and space telescopes are presented.
讨论有关天体测量中的测光问题，介绍一些地面天体测量仪器和空间天体测量望远镜的测光研究。
The Problem of astrometric photometry is discussed in this paper. The photometric capabilities on both the ground-based astrometric instruments and space telescopes are presented.
讨论有关天体测量中的测光问题，介绍一些地面天体测量仪器和空间天体测量望远镜的测光研究。
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