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