This script contours selected fields over a polar stereographic map
projection at selected Zp pressure levels. User settable options include
color, curly-vector overlay, and postscript file output.
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1) user choice: black and white + longitude (geographic coordinates)
comment out colormap
; colormap = "BlWhRe"
type = "lon"
lon2plt = -180
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2) user choice: color + solar local time (geographic coordinates)
colormap = "BlWhRe"
type = "slt"
slt = 10
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3) user choice: color + slt + limit axis + manually select
contour intervals (geographic coordinates)
colormap = "BlWhRe"
type = "slt"
slt = 12
ymin = -13
ymax = -5
manlev = True
minlev = -40
maxlev = 40
int = 40
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4) user choice: color + zonal mean (magnetic coordinates)
colormap = "BlWhRe"
type = "zmean"
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5) user choice: color + height interpolation
colormap = "BlAqGrYeOrRevi200"
height = True
top = 100
bott = 20
dz = 40
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6) user choice: color + denisty unit converstion + limit y-axis
colormap = "BlAqGrYeOrRevi200"
ymin = -8
ymax = -4
density_units = "CM3"
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