1. Orbital Characteristics of Megha-Tropiques T.Ravindra Babu M.S.Jayashree G.Raju ISRO Satellite Centre Bangalore

2. Payloads Microwave Analysis and Detection of Rain and Atmospheric Structures (MADRAS) A microwave instrument for retrieval of water vapour vertical profiles (SAPHIR) A radiometer devoted to the measurement of Outgoing radiative fluxes at the top of atmosphere (SCARAB)

3. Keplerian Elements   X,Y,Z – Earth Centred Inertial Coordinate System N – Ascending node, point of intersection between Equatorial and orbital planes, when spacecraft is North bound P – Perigee point S – Spacecraft i - inclination of orbit  - Right Ascension of Ascending node  - Argument of perigee  - True anomaly, related to Eccentric Anomaly (E). E and Mean anomaly(M) are related through Kepler’s equation i  P N X Y Z S

4. Repeat Cycle Non-sun synchronous orbit Ground track repetitivity Prograde orbit (inclination, i < 90  ) Repeat cycle as function of nodal days

5. Repeat Cycle – options Altitude Profile

6. Repeat Cycle - options Revolutions per day

7. Repeat Cycle – Chosen orbit No. of nodal days in the cycle : 7 No. of revolutions per cycle : 97 Nodal period of the orbit : 6116.4 sec No. of revolutions per day : 14.13 Rate of Right Ascension of node : - 6.01 deg/day Apsidal rotation rate (frozen perigee): 0 deg/day

8. Sun-aspect Angle x Y Z Sun-aspect angle

9. Sun Angles Sun Aspect Angle variation

10. Sun Angles

11. Radio visibilities in one cycle

12. Ground Trace

13. Frozen orbit analysis

14. Eclipse Duration

15. Local Time Descending Node local time of 12:00 N

16. Local Time change

17. Ground Track Velocity

18. Ground track azimuth

19. Earth coverage