From RHESSI Wiki
Introduction
Using the search capabilities outlines in a previous nugget, we can now do a retrospective analysis to see how successful - or otherwise - our coordinated observations have been during Solar Cycle 24.
Figure 1: Plot of Solar Cycles 23 and 24 (average monthly sunspot number) with mission durations overplotted. The two vertical dotted lines denote the 6.5 year time range considered for this study. Note that SDO/EVE MEGS-A and IRIS only overlapped for ~11 months.
Statistics
Instrument | C-class | M-class | X-class | Total | Success Rate
|
RHESSI | 3,673 | 370 | 23 | 4,066 | 58%
|
SDO/EVE MEGS-A | 3,825 | 343 | 19 | 4,187 | 100%
|
SDO/EVE MEGS-B | 787 | 97 | 8 | 892 | 12%
|
Hinode/EIS | 496 | 54 | 6 | 556 | 8%
|
Hinode/SOT | 1,167 | 177 | 15 | 1,359 | 20%
|
Hinode/XRT | 3,793 | 357 | 26 | 4,122 | 59%
|
IRIS | 523 (3,349) | 76 (335) | 5 (16) | 604 (3,700) | 16%
|
Degree | Number of flares observed | % of potentially observable flares
|
No instrument | 127 | 1.8%
|
Only 1 instrument | 1,432 | 20.6%
|
2 instruments | 2,371 | 34.1%
|
3 instruments | 2,035 | 29.2
|
4 instruments | 720 | 10.3%
|
5 instruments | 228 | 3.3%
|
6 instruments | 37 | 0.5%
|
7 instruments | 3 | 0.3%
|
UpSetR plots
Figure 2: UpSet plots of the intersection of flare datasets from each instrument as ordered by decreasing frequency (left) and increasing degree (right; zero elements sets not included).
Biographical Note
Ryan Milligan is currently an Ernest Rutherford Fellow at the University of Glasgow.
References
[1] "UpSet: Visualization of Intersecting Sets"