Detection of Solar Rotational Variability in the LYRA 190 - 222 nm Spectral Band
arXiv:1205.2377 · doi:10.1007/s11207-012-0029-2
Abstract
We analyze the variability of the spectral solar irradiance during the period from 7 January, 2010 until 20 January, 2010 as measured by the Herzberg channel (190-222 nm) of the Large Yield RAdiometer (LYRA) onboard PROBA2. In this period of time observations by the LYRA nominal unit experienced degradation and the signal produced by the Herzberg channel frequently jumped from one level to another. Both these factors significantly complicates the analysis. We present the algorithm which allowed us to extract the solar variability from the LYRA data and compare the results with SORCE/SOLSTICE measurements and with modeling based on the Code for the Solar Irradiance (COSI).
References in corpus (6)
- A new approach to long-term reconstruction of the solar irradiance leads to large historical solar forcing
- NLTE solar irradiance modeling with the COSI code
- The LYRA Instrument Onboard PROBA2: Description and In-Flight Performance
- Spectral irradiance variations: Comparison between observations and the SATIRE model on solar rotation time scales
- Latitudinal variation of the solar photospheric intensity
- Eclipses observed by LYRA - a sensitive tool to test the models for the solar irradiance