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TIP /AIRMASS

    /AIRMASS airmassStart [TO] airmassEnd [BY] airmassStep

    range of airmass for TIP.

    Real      :: airmassStart      !
    Real      :: airmassEnd        !
    Real      :: airmassStep       !

    NOTE 1: elevation = ASIN(1/airmass)

    NOTE 2: for slew-tips, TIP /SLEW:
            airmassStep has no effect
            airmassStart > airmassEnd is allowed; this implies:
            elevation (at start) < elevation (at end), i.e.,
            TIP from low to high elevation.

            (for "traditional" TIP with /SLEW no, airmassStart < airmassEnd,
            i.e., they go from high to low elevation.)


Gildas manager 2023-06-01