Performance of rubidium and quartz clocks in space

被引：12

作者：

Bloch, M ^{[1
]}

Mancini, O ^{[1
]}

McClelland, T ^{[1
]}

机构：

[1] Frequency Elect Inc, Mitchel Field, NY 11553 USA

来源：

PROCEEDINGS OF THE 2002 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & PDA EXHIBITION | 2002年

关键词：

D O I：

10.1109/FREQ.2002.1075936

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Space programs requiring precision time-keeping and stable frequency generation have been fitted with atomic frequency standards and super-stable quartz oscillators. However, the challenge has been to predict the clock performance in space based on tests conducted on Earth. This paper will focus on the actual performance of rubidium atomic frequency standards and quartz oscillators in space, and will demonstrate that the performance in space is predictable from modeling and tests carried out on Earth. Actual test data obtained on Earth as well as data from space will be presented. Aging performance and the effects of natural radiation will be addressed. Data will be presented from a space-based rubidium clock, designed and manufactured by Frequency Electronics, Inc., that is achieving fractional-frequency aging rates of 3 x 10(-14)/day and long-term Allan deviation of 1 x 10(-15)roott, and similarly, quartz clocks that are realizing aging rates of 1-2 x 10(-12)/day and long-term Allan deviation of 1.6 x 10(-14)roott. Furthermore, the paper will also address performance in the presence of solar flares and other space phenomena.

引用

页码：505 / 509

页数：5