The path that a satellite has to travel to stay in a Sun-synchronous orbit is very narrow. If a satellite is at a height of 100 kilometers, it must have an orbital inclination of 96 degrees to maintain a Sun-synchronous orbit. Any deviation in height or inclination will take the satellite out of a Sun-synchronous orbit. Satellite Orbit Orbit Period 98.9 minutes Time of Day 10:30 am (Local) Example of a sun-synchronous polar orbit with an orbital altitude of 705 km above the Earth’s surface, an orbital peri-od of 98.9 minutes, resulting in 14.3 orbits per day, and an orbital inclination of 98.2° at the Equator. India's Polar Satellite Launch Vehicle, in its 40th flight (PSLV-C38), will launch the 712 kg Cartosat-2 series satellite for earth observation and 30 co-passenger satellites together weighing about 243 kg at lift-off into a 505 km polar Sun Synchronous Orbit (SSO).
Advantages of Sun synchronous orbit disadvantages of Sun synchronous orbit
This page covers advantages and disadvantages of Sun synchronous orbit and its basics.It mentions benefits or advantages of Sun synchronous orbit and drawbacks or disadvantages of Sun synchronous orbit.
What is Sun synchronous orbit?
An earth satellite orbit in which the orbital plane is near polar and the altitude is such thatsatellite passes over all places on earth having same latitude twice in each orbit at the same local suntime.This orbit lies at a altitude between 700 to 800 Km above the Earth.
The satellite in this orbit shift its orbital plane by approx. one degree/day.Satellites put in this orbit cover each area of the world at a constant local time of the day called local sun time.
Benefits or advantages of Sun synchronous orbit
Following are the benefits or advantages of Sun synchronous orbit:
➨The orbit is designed in such a way that angle between orbital plane and sun remains constantresulting into consistent lighting conditions.
➨The satellites in this orbit can help in monitoring activities near the poles unlike other satellites.
➨The Sun synchronous orbiting satellites cover entire globe on regular basis and provides repetitive coverage on periodic basis.Satellite passes over all places on earth having same latitude twice in each orbit at the same local suntime.
➨Low altitude of this orbit allows good ground resolution.
➨It offers easy active measurements with the help of Radar or using Lidar.
Drawbacks or disadvantages of Sun synchronous orbit
Following are the drawbacks or disadvantages of Sun synchronous orbit:
➨The satellite launched in this orbit can not view a particular spot on the Earth's surface continuously.This is done by geosynchronous orbiting satellite.
➨For weather forecasting the use of polar orbiting satellite data is limited unlike Geosynchronous orbiting satellite.
➨Sun synchronous orbiting satellite passes over polar parts on every orbital period which is 2 times a day where asgeosynchronous orbiting satellite orbital period is approx. 24 hours. Hence Geosynchronous satellite can view a particular spot on the Earth's surface continuously.
Conclusion: In order to understand advantages of Sun synchronous orbit and disadvantages of Sun synchronous orbit one has to understandSun synchronous orbit basics >>.
Satellite related links
To know more about satellite go through following mentioned links:
Satellite tutorialwhat is a satelliteSatellite frequency bands of operationParts of a satelliteSatellite OrbitsSatellite ServicesSatellite typesSatellite Capacity AllocationSatellite Network ConfigurationSatellite ApplicationsSatellite TerminologySatellite ApplicationsSatellite Launch ProcedureRemote sensing satellitesSatellite TTCSatellite Launch Service ProvidersSatellite Parts Manufacturers
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