Satellite tracker based on two line elements - programmed by Jens T. Sætre

NOTE: This calculator does not use the SDP4 model
Try Satellite Position List if higher accuracy with SDP4 is required

Two Line Elements:

Site Location		Find your coordinates at GNS Search
Site Latitude	Degrees	deg. min sec
Site Longitude	Degrees	deg. min sec
Epoch time
Time elepsed since epoch	hh:mm:ss
TLE data and time format
Julian Day
Modified Julian Day
Days since J2000.0
Day
Month
Year
Hour		(UTC)
Minute		(UTC)
Second		(UTC)
Time of calculation	Local time (if offset from UTC)
Satellite common name		from TLE
Object Id		from TLE
International Designator		from TLE
Elset Classification		from TLE
Number of orbits at Epoch		from TLE
Number of orbits now
Earth Rev/solarday	rev/day
Earth Deg/solarday	deg/day
Earth Rev/siderealday	rev/day
Earth Deg/siderealday	deg/day
Satellite Deg/siderealday	deg/day
Satellite Rev/sidereal	rev/day	(calculated for the time selected)
Satellite Deg/solarday	deg/day
Epoch		from TLE
Inclination	deg	from TLE
Right Ascension of Ascending node	deg	from TLE
Eccentricity		from TLE
Argument of perigee	deg	from TLE
Mean anomaly, M0	deg	at reference time (from TLE)
Mean anomaly Calculated	deg	calculated for time selected
True anomaly (v)	deg
Mean Motion from TLE data	rev/day (Satellite Rev/solarday)	from TLE
Current Motion	rev/day
1st derative of the Mean Motion	rev/day^2	from TLE
Eccentric anomaly before iterations	deg
Eccentric anomaly error before iterations	deg
Eccentric anomaly after iterations	deg
Eccentric anomaly error after iterations	deg
Number of eccentric anomaly iterations
Xo orbital plane	km
Yo orbital plane	km
r orbital plane	km
Geocentric, x	km
Geocentric, y	km
Geocentric, z	km from equator
Right Ascension	deg
GMST	deg
Declination	deg (current inclination)
Satellite E/W oscillation caused by inclination	deg
Satellite E/W oscillation caused by eccentricity	deg
Current Driftrate	deg/day
Average Driftrate	deg/day
Longitude Driftrate	deg/day
Longitude after 24hours	deg
Altitude	km	from GEO now: Average from GEO:
Altitude (Geodetic)	km
Satellite period,TC	hh:mm:ss
Nominal GEO period	hh:mm:ss
Satellite velocity	km/s
Altitude at Perigee	km
Altitude at Apogee	km
Semi-Major-Axis	km
Semi-Minor-Axis	km
Satellite Longitude	deg
Satellite Geocentric Latitude	deg
Satellite Geodetic Latitude	deg
Satellite Azimuth	deg
Satellite Elevation	deg
Satellite Range	km

Some sources of information used:

Johannes Kepler 1571-1630
Kepler's laws of planetary motion
M. Richharia - Satellite Communications Systems
http://home.att.net/~srschmitt/script_clock.html
Satellite Times Computers and Satellites
Two Line Elements - Space Track
Two Line Elements - Celestrak
View Earth from satellite
View Earth from satellite (example THOR 5)
Clarke Belt Snapshot Calculator (lists satellitte longitudes)
Heavens Above
ORBITRON
C sourcecode example for TLE based orbit calculations
Paul Schlyters Stjarnhimlen
REAL TIME SATELLITE TRACKING
ORBITRON tracker (free)