The main objective of the Megha-Tropiques mission is to study the convective systems that influence the tropical weather and climate. The Megha-Tropiques mission goals are as follows:
- To provide, simultaneous measurements of several elements of the atmospheric water cycle (water vapour, clouds, condensed water in clouds, precipitation and evaporation),
- To measure the corresponding radiative budget at the top of the atmosphere,
- To ensure high temporal sampling in order to characterize the life cycle of the convective systems and to obtain significant statistics.
The payloads have swaths of around 1700-200km. It is necessary to measure the above parameters for a minimum duration of 3 years in order to observe the inter-annual variability and getting an opportunity to observe El Nino-type events in the tropics.
The satellite is launched into a non-sun synchronous orbit, unlike other IRS spacecraft. This Megha-Tropiques satellite carries four payloads namely, MADRAS-a microwave imager, SAPHIR-scanning radiometer instrument, SCARAB-scanner for radiative budget and GPS occultation receiver for atmospheric studies. The major orbit parameters are:
|Altitude:||867 km, circular|
|Repetitivity:||97 orbits in 7 days|
|No. of Orbits Per day:||14 (approx.)|