Why in News:

• The PSLV C-52 carrying the Earth Observation Satellite, EOS – 04, the INS-2TD, a technology demonstrator from ISRO and the INSPIREsat-1, a student satellite, lifted off from the Satish Dhawan Space Centre.

About the satellites

• The INS-2TD is a precursor to the India-Bhutan joint satellite [INS 2-B] and will assess land and water surface temperatures, delineation of crops and forest and thermal inertia.
• The INSPIREsat-1 is a student satellite from the Indian Institute of Space Science and Technology in association with the University of Colorado, USA and is aimed at improving the understanding of ionosphere dynamics and the Sun’s coronal heating processes. 
• ISRO plans to place the EOS-04 in a sun synchronous polar orbit. EOS-04 is a radar-imaging satellite, designed to provide high-quality images under all weather conditions for applications such as agriculture, forestry & plantations, soil moisture and hydrology, and flood mapping.

To read about types of orbits- https://officerspulse.com/earth-observation-satellite-eos-04/

Reference:

1. https://www.thehindu.com/news/national/tamil-nadu/isro-successfully-puts-three-satellites-into-orbit-on-board-the-pslv-c-52/article65047972.ece