The SSLV rocket which will take flight on August 7 will carry the Indian tricolour, which will be unfurled in space to mark the 75th year of independence.

The SSLV weighs around 120 tonnes & is about 34 metres tall, making it the lightest & the smallest commercial rocket built by ISRO.

The rocket can put a payload of 500 kg up to 500 km in planet's orbit. But unlike bigger rockets, the SSLV can also carry mini, micro, or nanosatellites (10 to 500 kg mass).

It will carry 2 payloads on its maiden flight. 1st is the EOS-02, an indigenously developed satellite, which will offer advanced optical remote sensing operations.

The second satellite payload is the 8kg 8U Cubesat AzaadiSAT, which has been developed by 750 school girls across 75 schools in rural India.

The satellite will carry a "special" space song along with the national anthem sung by Rabindranath Tagore.

It will also carry a UHF-VHF transponder working in the 420-450MHz wavelength, which is used for ham radio, for creating a space-based LoRA (long-range radio) gateway.

The experiment will determine if important discrete devices like sea buoys, tsunami buoys, and landslide monitoring sensors can communicate over long distances.