Explanation of statistic calculation

For each spiral the average value in a 100 m altitude layer was calculated. 
Spirals were grouped by location and month. 
In this grouping the median, mean, minimum, maximum, 25th quartile,
75th quartile, and standard deviation were calculated for each altitude level.

Excel spreadsheet headers


Spreadsheet header
Full Explanation
Median
Meadian value for all spirals in the given altitude range
Mean
Mean value for all spirals in the given altitude range
Min
Minimum value for all spirals in the given altitude range
Max
Maximum value for all spirals in the given altitude range
q25
The value of the 25th quartile for all spiral in the given
altitude range
q75
The value of the 75th quartile for all spiral in the given
altitude range
stdev
The standard deviation for all spirals in the given
altitude range
alt
The pressured derived altitude with units of km
minus
The median value minus the 25th quartile value
(allows the 25th quartile value to be plotted as an error bar)
plus
The median value plus the 75th quartile value
(allows the 75th quartile value to be plotted as an error bar)

Worksheet tab abbreviations


Tab abbreviation
Tab explanation
Bap 550
The aerosol absorption measurement at 565 nm
Bscatt 450
The total aerosol scattering measurement at 450 nm
Bscatt 550
The total aerosol scattering measurement at 550 nm
Bscatt 700
The total aerosol scattering measurement at 700 nm
Backrat 450
The ratio of backscattering over total aerosol
scattering at 450 nm
Backrat 550
The ratio of backscattering over total aerosol
scattering at 550 nm
Backrat 700 The ratio of backscattering over total aerosol
scattering at 700 nm
SSA 550
The single scattering albedo at 550 nm
tau 550
The optical depth at 550 nm



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