A CCD SYSTEM FOR READING CIRCLES IN WIDE-ANGLE ASTROMETRY

被引：4
|
作者：
STONE, RC
MONET, DG
BIRD, AR
机构：
[1] U.S. Naval Observatory, Flagstaff Station, Flagstaff, AZ 86002
来源：
ASTRONOMICAL JOURNAL | 1991年 / 101卷 / 06期
关键词：
D O I：
10.1086/115852
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
This paper describes a CCD circle reading system developed for the USNO (Flagstaff) transit telescope. Circle readings are needed for the determination of declinations in wide-angle astrometry. The detectors are commercially available Philips CCD-TV imaging cameras, which can produce digital images every 1/15 of a second. The positions of division marks on the circle are determined by fitting a function to their profiles. This reading system is very accurate (+/- 0.007 arcsec), fast, and extremely reliable. Also, since the digital output is two-dimensional, the radial positions of division marks on a circle can also be determined, but with lower accuracy (+/- 1.2-mu-m).
引用
收藏
页码：2311 / 2316
页数：6
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