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The Firefly CubeSat Mission

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D. Rowland<br />

How bright<br />

Brightness<br />

are<br />

distribution cuts<br />

they?<br />

off sharply around RHESSI's<br />

Fs observed during a single pass over a single storm:<br />

Wednesday, April 22, 2009<br />

For dessert:<br />

RHESSI cannot discriminate background<br />

fluctuations from TGFs at low fluxes<br />

(from Smith et al., SCIPP seminar, 2005)<br />

RHESSI Instrument saturates at high count rates.<br />

Possibly underestimating TGF fluxes by 2-5.<br />

sensitivity limit for our triggering algorithm; is this the<br />

tip of the iceberg?<br />

?<br />

10 6<br />

10 5<br />

10 4<br />

10 3<br />

10 2<br />

10 3<br />

RHESSI<br />

1 µs deadtime<br />

no deadtime<br />

0.1 µs deadtime<br />

<strong>CubeSat</strong> Developers’ Workshop April 22, 2009<br />

10 4<br />

10 5<br />

10 6<br />

8

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