ERS-2 Mission Phase A
Phase A parameters
Phase A parameters
- 35 days repeat cycle
- 501 orbits per cycle
Orbit number characteristics
- First absolute orbit number is: 1 on 21-apr-95, 03:16:54.739 UTC
- First internal track: 147 of cycle 0
Orbit parameters
- orbit eccentricity: 0.001165
- orbit inclination: 98.5421 deg
- asc. node Long.: 243.0078 deg
- semi-major axis: 7159495.96 m
- mean nodal period: 6035.928144 s
- mean anomaly: 270.1334 deg
- argument of perigee: 90 deg
Formulas from Relative (track) to Absolute Orbit Numbers
ABS_ORB_NUM = REL_ORB_NUM + CYCLE_NUM*501 - 146
CYCLE_NUM = INT [ ( ABS_ORB_NUM + 145)/501 ]
REL_ORB_NUM = ABS_ORB_NUM + 146 - CYCLE_NUM*501
Where:
- the "Absolute Orbit Number" is counted from the beginning of the mission;
- the "Relative Orbit Number" (track), in a given cycle,
is counted starting from the first orbit East of Greenwich;
- the "Cycle Number" is increased whenever the track 1 is rivisited (note that the first cycle
(Cycle 0) was incomplete)
This information was partly retrieved from ESA/ESRIN
