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OPTIONS /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