The Spectral Irradiance Monitor: Scientific requirements, instrument design, and operation modes

被引:105
作者
Harder, J [1 ]
Lawrence, G [1 ]
Fontenla, J [1 ]
Rottman, G [1 ]
Woods, T [1 ]
机构
[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA
基金
美国国家航空航天局;
关键词
D O I
10.1007/s11207-005-5007-5
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Spectral Irradiance Monitor (SIM) is a dual Fery prism spectrometer that employs 5 detectors per spectrometer channel to cover the wavelength range from 200 to 2700 nm. This instrument is used to monitor solar spectral variability throughout this wavelength region. Two identical, mirror-image, channels are used for redundancy and in-flight measurement of prism degradation. The primary detector for this instrument is an electrical substitution radiometer (ESR) designed to measure power levels similar to 1000 times smaller than other radiometers used to measure TSI. The four complementary focal plane photodiodes are used in a fast-scan mode to acquire the solar spectrum, and the ESR calibrates their radiant sensitivity. Wavelength control is achieved by using a closed loop servo system that employs a linear charge coupled device (CCD) in the focal plane. This achieves 0.67 arcsec control of the prism rotation angle; this is equivalent to a wavelength positioning error of delta lambda/lambda = 150 parts per million (ppm). This paper will describe the scientific measurement requirements used for instrument design and implementation, instrument performance, and the in-flight instrument operation modes.
引用
收藏
页码:141 / 167
页数:27
相关论文
共 29 条
[1]   MODTRAN4: Radiative transfer modeling for remote sensing [J].
Anderson, GP ;
Berk, A ;
Acharya, PK ;
Matthew, MW ;
Bernstein, LS ;
Chetwynd, JH ;
Dothe, H ;
Adler-Golden, SM ;
Ratkowski, AJ ;
Felde, GW ;
Gardner, JA ;
Hoke, ML ;
Richtsmeier, SC ;
Pukall, B ;
Mello, J ;
Jeong, LS .
OPTICS IN ATMOSPHERIC PROPAGATION AND ADAPTIVE SYSTEMS III, 1999, 3866 :2-10
[2]   THE NEAR INFRARED ABSORPTION SPECTRUM OF LIQUID WATER [J].
CURCIO, JA ;
PETTY, CC .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1951, 41 (05) :302-304
[3]   The Spectral Irradiance Monitor (SIM) for the SORCE mission [J].
Harder, J ;
Lawrence, G ;
Rottman, G ;
Woods, T .
EARTH OBSERVING SYSTEMS V, 2000, 4135 :204-214
[4]   Solar Spectral Irradiance Monitor (SIM) [J].
Harder, J ;
Lawrence, GM ;
Rottman, G ;
Woods, T .
METROLOGIA, 2000, 37 (05) :415-418
[5]  
HAVEY K, 1992, SPIE, V1761, P2
[6]  
Hengstberger F., 1989, Absolute Radiometry: Electrical Calibrated Thermal Detectors of Optical Radiation
[7]   Effects of short-term solar UV variability on the stratosphere [J].
Hood, LL .
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 1999, 61 (1-2) :45-51
[8]  
JAMES JF, 1969, DESIGN OPTICAL SPECT, P41
[9]  
JOHNSON CE, 1980, MET FINISH, P21
[10]  
Kiehl JT, 1997, B AM METEOROL SOC, V78, P197, DOI 10.1175/1520-0477(1997)078<0197:EAGMEB>2.0.CO