I got the latest TLE from
www.celestrak.com for a satellite. How could I convert it to osculating elements?
Please, share some links/references.
Spacetrack Report #3 provides the equations in readable mathematical format and FORTRAN code to propagate TLEs. The final output of the algorithm, denoted by X, Y, Z, XDOT, YDOT and ZDOT are the position and velocity in inertial frame, which can be converted to osculating elements by traditional methods.