表达式22: "r" Subscript, "o" "r" "b" "i" "t" , Baseline minus left parenthesis, "r" Subscript, "a" "t" "m" "o" , Baseline plus "r" Subscript, "p" "l" "a" "n" "e" "t" , Baseline , right parenthesisrorbit−ratmo+rplanet
22
CommNet height from planet's surface
23
表达式24: StartFraction, "r" Subscript, "o" "r" "b" "i" "t" , Baseline Over 2 , EndFraction minus "r" Subscript, "p" "l" "a" "n" "e" "t" , Baselinerorbit2−rplanet
