The Library tle_YYYYMMDD process TLE files and converts the information 
from there to [X, XDOT] at a given epoch

src codes:
geod_ecef       -- geod_2_ecef
		   Converts geodetic coordinates to Earth-centered-Earth-Fixed
                -- geod_2_enu
		   Converts geodetic coordinates to local coordinates
                -- geod_2_enu_B
		   Converts geodetic coordinates to local coordinates, reference
		   coordinates given in cartesian
		-- enu_2_avd
		   compute the look angles from local coordinates
                
k3p13r_2	-- eccentric_anomaly
                   compute eccentric anomaly from the mean anomaly and eccentricity
		-- kepler_b
		   compute the state vector from keplerian elements

read_tle_file   -- read contents of a tle file

rot_sub		-- Define 3x3 rotational matrices and their derivatives wrt time

tle_azel_comp   -- program to show how to compute look angles starting with a TLE

tle_deep        -- routines for defining deep space parameters

tle_driver      -- routine to compute [X, XDOT] given tle file and epoch

tle_sdp4        -- compute the state vectors for deep space objects

tle_sgp4        -- compute state vectors for near Earth objects

tle_to_coo	-- compute the state vector at the epoch of the TLE

example codes:

tle_example_to_coo --





------------------------------
The following source codes are included, with their general functionality
described:

dpper            -- Through this routine, the current values of the orbital
                    elements are passed to the deep-space subroutine which
		    in turn adds the appropriate deep- space lunar and solar
		    periodics to the orbital elements.

dscom            -- Provides the deep space common variables used both by the
                    secular and periodic subroutines

dsinit

dspace           -- provides any third body contributions to deep space objects

getgravconst

gstime

initl

newtonnu  

rv2coe

sgp4

sgp4init

tle_angle   

tle_asinh

tle_cross

tle_days2mdhms   -- Converts tle days to month, day, hours, mins, and secs

tle_dot

tle_driver

tle_invjday

tle_jday

tle_mag

tle_parser

tle_to_crs

tle_to_trs

tledate_to_mjdsec

twoline2rvsgp4

