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uniquorn:
Resizing table for overlays:
satellite           pxl       %      ~km/pxl    ~km^2/pxl
SMOS              397.5    75.815   11.92      5.06
Ascat              524.3   100.000    9.04      6.67
OsiSaf            1075.5   204.711    4.41     13.66
SMOS-SMAP   1146.0   218.577    4.13     14.59
AMSR2           1197.6   228.419    3.96     15.24


uniquorn:
method for creating graticules from A-Team. 2 examples with mosaic start area.

--- Quote ---tech note: to crop to a lat-lon rectangle on an image lacking a suitable graticule, draw a vertical line through the north pole on a transparent layer copy, then rotate it to provide the lon lines. fix the circle tool to 1:1, find the number of pixels to an outer lat line, reduce the circle appropriately, cut the center, enlarge the circle, cut the inverted selection, autocrop image.

formula πR² * diff in lons * diff in sin(lats)

πR² = 126916372 sq km WGS84
πR² = 127516118 sq km sphere

42,900 sq km WGS84 for two degree lat, 20 degrees long
43,103 sq km sphere  for two degree lat, 20 degrees long

64,350 sq km WGS84 for two degree lat, 30 degrees long
64,654 sq km sphere  for two degree lat, 30 degrees long

--- End quote ---

uniquorn:
osisaf graticule

MyACIsDying:
R code for this animation attached. I'm practicing and much needs to be optimized, this run took about 2 hours..

Code is commented as sensibly as possible and can be run to produce the same result, 35 images, gif making done with ezgif. magick for next time.

requires 1.5GB disk space

uniquorn:
Good gradient palette

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