FLASHES structure name: flash
	Status	Parameter	Structure Element Name	Type	Size	Description
A		flash time	TAI93_time	float64	1	TAI93 time of 1st event in flash
B		point data time span	delta_time	float32	1	delta time between the first and last group that compose the flash
C		length of observation	observe_time	int16	1	length of observation of the region where the flash occurred (viewtime approximation at flash centroid)
D		geolocated position	location	float32	2	latitude & longitude centroid (radiance weighted average?)
E		calibrated radiance	radiance	float32	1	sum of event radiances that compose the flash
F		footprint size	footprint	float32	1	unique areal extent of flash in sq km (group overlap should not increase value)
G		flash record number	address	int32	1	flash address
H		parent record number	parent_address	int32	1	pointer to parent's address (area)
I		child record number	child_address	int32	1	address of 1st group in a sequential list
J		number of children	child_count	int32	1	number of groups
K		number of grand-children	grandchild_count	int32	1	number of events
L		8-bit threshold value	approx_threshold	byte	1	estimated value of threshold (8-bit digital count) for the flash determined from the background level of illumination
M		alert flag	alert_flag	byte	1	reflects status of instrument, platform, external factors, and processing algorithms ("or" of all group alert flags)
N		clustering probability tag	cluster_index	byte	1	ranges from 0 to 99 (a high number indicates that flash is not likely to be random noise (100 - percent signal) -- value computed from the average of group values
O		lightning activity index	density_index	byte	1	a spatial metric that indicates whether the flash was geolocated in a region of high lightning activity -- value computed from the average of group values
P		noise index	noise_index	byte	1	a metric that indicates whether the flash was detected during a period of high noise -- value computed from the average of group values
Q		solar glint cosine	glint_index	float32	1	cosine of angle -- value computed from the average of group values
R		eccentricity	oblong_index	float32	1	a metric indicating how oblong the area footprint is
S		time order	grouping_sequence	int32	1	time sequence of area used when grouping algorithm is applied
T		grouping status	grouping_status	byte	1	0 = flash grouped normally 1 = flash split between orbits - other half in next orbit 2 = flash split between orbits - other half in previous orbit 3 = grouping algorithm failed due to an overflow of the buffer size that was implemented