ISA is the air pecific gravity @ geopotential km.
It collects the three segments 0..11..20..85.
Each segment comes c/w its respective tool box,
though segment ISA2085 is from Mathcad 11.

Jean

Genfit Minimize [PDAS1120].sm (37.22 KiB) downloaded 248 time(s).
Thiele QUICK [ISA2085].sm (55.62 KiB) downloaded 238 time(s).
Inst_ISA.sm (146.94 KiB) downloaded 276 time(s).
Thiele QUICK [PDAS11].sm (54.18 KiB) downloaded 233 time(s).