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arXiv 1801.09421astro-ph.IM
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普朗克望远镜发射率的飞行测量

In-flight measurement of Planck telescope emissivity

F. Cuttaia, L. Terenzi, G. Morgante, M. Sandri, F. Villa, A. De Rosa, E. Franceschi, M. Frailis, S. Galeotta, A. Gregorio, P. Delannoy, S. Foley, B. Gandolfo, A… 展开作者

F. Cuttaia, L. Terenzi, G. Morgante, M. Sandri, F. Villa, A. De Rosa, E. Franceschi, M. Frailis, S. Galeotta, A. Gregorio, P. Delannoy, S. Foley, B. Gandolfo, A. Neto, C. Watson, F. Pajot, M. Bersanelli, R. C. Butler, N. Mandolesi, A. Mennella, J. Tauber, A. Zacchei

摘要:

普朗克卫星在轨任务于2013年10月结束。在低频仪器(LFI)例行任务结束和卫星退役之间,还进行了专门的测试,以测量普朗克望远镜的发射率。测试的范围有两个方面:(一)首次在飞行中直接测量望远镜的发射率;(二)通过比较飞行任务结束时在飞行中获得的数据与地面望远镜表征期间获得的数据,评估发射率可能下降的情况。通过加热普朗克望远镜并解开由LFI辐射计测量的系统温度过剩来确定发射率。结果表明,寿命终止(EOL)性能与地面光学测试结果以及在调试和性能验证(CPV)阶段测量的飞行中间接估计结果非常一致。方法和结果进行了介绍和讨论。

英文摘要:

The Planck satellite in orbit mission ended in October 2013. Between the end of Low Frequency Instrument (LFI) routine mission operations and the satellite decommissioning, a dedicated test was also performed to measure the Planck telescope emissivity. The scope of the test was twofold: (i) to provide, for the first time in flight, a direct measure of the telescope emissivity; and (ii) to evaluate the possible degradation of the emissivity by comparing data taken in flight at the end of mission with those taken during the ground telescope characterization. The emissivity was determined by heating the Planck telescope and disentangling the system temperature excess measured by the LFI radiometers. Results show End of Life (EOL) performance in good agreement with the results from the ground optical tests and from in-flight indirect estimations measured during the Commissioning and Performance Verification (CPV) phase. Methods and results are presented and discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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