We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
The SWAP EUV Imaging Telescope. Part II: In-flight Performance and Calibration.
- Authors
Halain, J.-P.; Berghmans, D.; Seaton, D.; Nicula, B.; Groof, A.; Mierla, M.; Mazzoli, A.; Defise, J.-M.; Rochus, P.
- Abstract
The Sun Watcher with Active Pixel System detector and Image Processing (SWAP) telescope was launched on 2 November 2009 onboard the ESA PROBA2 technological mission and has acquired images of the solar corona every one to two minutes for more than two years. The most important technological developments included in SWAP are a radiation-resistant CMOS-APS detector and a novel onboard data-prioritization scheme. Although such detectors have been used previously in space, they have never been used for long-term scientific observations on orbit. Thus SWAP requires a careful calibration to guarantee the science return of the instrument. Since launch we have regularly monitored the evolution of SWAP's detector response in-flight to characterize both its performance and degradation over the course of the mission. These measurements are also used to reduce detector noise in calibrated images (by subtracting dark-current). Because accurate measurements of detector dark-current require large telescope off-points, we also monitored straylight levels in the instrument to ensure that these calibration measurements are not contaminated by residual signal from the Sun. Here we present the results of these tests and examine the variation of instrumental response and noise as a function of both time and temperature throughout the mission.
- Subjects
IMAGE converters; NOISE measurement; TEMPERATURE effect; PERFORMANCE evaluation; HELIOSEISMOLOGY; SOLAR corona; SOLAR evolution; SUN
- Publication
Solar Physics, 2013, Vol 286, Issue 1, p67
- ISSN
0038-0938
- Publication type
Article
- DOI
10.1007/s11207-012-0183-6