add function to calculate mean Omega as a function of angle along the stream, also add tdisrupt parameter
add function to calculate mean Omega as a function of angle along the stream, also add tdisrupt parameter

followthesheep/galpy,followthesheep/galpy,jobovy/galpy,jobovy/galpy,jobovy/galpy,followthesheep/galpy,jobovy/galpy,followthesheep/galpy