The Total Irradiance Monitor (TIM): Instrument design

被引：106

作者：

Kopp, G ^{[1
]}

Lawrence, G ^{[1
]}

机构：

[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

来源：

SOLAR PHYSICS | 2005年 / 230卷 / 1-2期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1007/s11207-005-7446-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Total Irradiance Monitor (TIM) instrument is designed to measure total solar irradiance with an absolute accuracy of 100 parts per million. Four electrical substitution radiometers behind precision apertures measure input radiant power while providing redundancy. Duty cycling the use of the radiometers tracks degradation of the nickel-phosphorous absorptive black radiometer interiors caused by solar exposure. Phase sensitive detection at the shutter frequency reduces noise and simplifies the estimate of the radiometer's equivalence ratio. An as-designed uncertainty budget estimates the instrument's accuracy goal. The TIM measurement equation defines the conversion from measured signal to solar irradiance.

引用

页码：91 / 109

页数：19

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