Solar–Stellar Irradiance Comparison Experiment II (Solstice II): Instrument Concept and Design |
| |
| Authors: | William E Mcclintock Gary J Rottman Thomas N Woods |
| |
| Institution: | (2) Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, U.S.A. |
| |
| Abstract: | The Solar–Stellar Irradiance Comparison Experiment II (SOLSTICE II) is one of four experiments launched aboard the Solar Radiation and Climate Experiment (SORCE) on 25 January, 2003. Its principal
science objectives are to measure solar spectral irradiance from 115 to 320 nm with a spectral resolution of 1 nm, a cadence
of 6 h, and an accuracy of 5% and to determine solar variability with a relative accuracy of 0.5% per year during a 5-year
long nominal mission. SOLSTICE II meets these objectives using a pair of identical scanning grating monochromators that can measure both solar and stellar
irradiance. Instrument radiometric responsivity was calibrated to ∼3% absolute accuracy before launch using the Synchrotron
Ultraviolet Radiation Facility (SURF) at the National Institute for Standards and Technology (NIST) in Gaithersburg, MD. During
orbital operations, SOLSTICE II has been making daily measurements of both the Sun and an ensemble of bright, stable, main-sequence B and A stars. The stellar
measurements allow the tracking of changes in instrument responsivity with a relative accuracy of 0.5% per year over the life
of the mission. SOLSTICE II is an evolution of the SOLSTICE i instrument that is currently operating on the Upper Atmosphere Research Satellite (UARS). This paper reviews the basic SOLSTICE
concept and describes the design, operating modes, and early performance of the SOLSTICE II instrument. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
