Speaker
Dr
Athanassios Katsiyannis
(Royal Observatory of Belgium)
Description
The Large Yield RAdiometer (LYRA) is an ultraviolet irradiance
radiometer on-board ESA's PROBA2 micro-satellite. Since it's launch in
2009 it observes the Sun in four different passbands, chosen for their
relevance to solar physics, aeronomy and space weather. Flying on an
altitude of 735km, LYRA proved to be an excellent flare monitor and is
involved in the analysis the atmospheric composition of the Earth.
One of the most peculiar and intriguing results of LYRA is the
detection of short, strong, bursts that do not directly correlate with
solar coronal events, nor with pointing of the instrument to Earth's
upper atmosphere, but correlate well with high K$_{p}$ index on
Earth's surface. As LYRA has the ability to observe in four different
UV bandpasses, the comparison between the filters that allow the
detection of this activity versus those that do not, reveals very
interesting results as to the nature of those detections.
Primary author
Dr
Athanassios Katsiyannis
(Royal Observatory of Belgium)
Co-author
Marie Dominique
(ROB)
