Digital images of albedo of the lunar nearside - what is inside?

Albedo data stored in IZIUM format with following image dimensions:

  • number of rows = 879
  • number of columns = 879
  • bytes per pixel = 2


    • Image projection = right orthographical

    How to obtain selenographic coordinates from row and column number?

    column number = R*cos(b)*sin(l)+x0
    row number = y0-R*sin(b)
    where:
    x0 = y0 = R = 434.5 (radius of the Moon on the image),
    b = selenographic latitude
    l = selenographic longitude

    Because of IZIUM files must contain only integer values, all files contain the albedo values in %, multiplied by 1000 and
    then rounded to nearest integer: i.e.pixel value of 12345 corresponds to 12.345 % albedo or 0.12345 fractional albedo.


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