- ISRO will launch the PSLV-C45 mission on April 1 which will be significant in many ways.
About PSLV-C45 mission
- PSLV-C45 mission will primarily launch the 435 kg EMISAT, electronic intelligence satellite.
- It will also launch 28 foreign satellites for USA, Lithuania, Spain and Switzerland.
- The 4th stage of the rocket PS-4 will act as the orbital platform for the following experimental satellites:
- ARIS satellite of Indian Institute of Space Science and Technology to study the structure and composition of ionosphere.
- Automatic Identification System (AIS) for Maritime satellite applications
- Amateur radio applications satellite
Significance of PSLV-C45
- It is the 1st mission that is using the QL variant of PSLV rocket launcher.
- This will be the 1st time ISRO will be launching satellites in 3 different orbits.
- EMISAT – 749 km
- 28 foreign satellites – 504 km
- Experimental satellites – 485 km
- This is the 2nd time ISRO is using the spent PS-4 stage (4th stage of the rocket) as an orbital platform. (PSLV-C44 was the 1st)
In brief: Polar Satellite Launch Vehicle (PSLV)
- PSLV is a 4-stage that uses alternate combination of liquid and solid fueled rocket stages.
- While the 1st and 3rd stages are solid-fueled, the 2nd and the 4th stages are propelled by liquid fuel.
- PSLV can deliver payloads of up to:
- 3,250kg to Low Earth Orbit
- 1600 kg to Sun Synchronous orbit
- 1400 kg to Geosynchronous Transfer Orbit
- PSLV is ISRO’s workhorse launch vehicle with 237 foreign satellites from 28 countries successfully launched between 1999 and 2018.
- Currently PSLV rockets have 4 variants:
- PSLV-CA (core alone)
- PSLV-XL – 6 strap-on motors
- PSLV-DL – 2 strap-on motors (PSLV-C44 was the 1st mission to use it)
- PSLV-QL- 4 strap-on motors
- Strap-on motors are used in the 1st stage of PSLV (solid stage) in order to provide additional thrust to the rocket.
- Additional thrust is needed in the 1st stage as the rocket has to overcome the air resistance in the atmosphere in order to be launched in the orbit.