PSLV-C45/ EMISAT

About: 

• Launch vehicle: The satellites were carried off by ISRO's PSLV-C45 from its spaceport, Satish Dhawan Space Centre, Sriharikotta.
  
  
• EMISAT: EMISAT is capable of gathering information of strategic value, in electromagnetic spectrum. Its devices have been developed by Defence Research and Development Organization (DRDO).
  
  
• Foreign satellites: The foreign satellites include 24 from the US, two from Lithuania and one each from Spain and Switzerland.
  • 20 of the US payloads are meant for earth observation, and are known as Flock-4A. Four other US payloads known as LEMUR are used for vessel automatic identification.
    
    
  • Switzerland’s Astrocast-2 is involved in studies of the cutting edge Internet-of-Things technology.
    
    
  • Aistechsat-3 of Spain is useful for remote asset management and aircraft tracking.
    
    
  • They have all been launched under an agreement with the Antrix Corporation, the commercial arm of ISRO.
    
    
  
  
  
• Multiple obits in the mission: The principal 'first-time' innovation this time is the multiple orbits involved in the mission. EMISAT and the 28 customer satellites have been ed into two different orbits, and later, the fourth stage engine of the rocket will be taken to a third orbit in space.
  
  
• QL configuration: In this mission, the rocket PSLV C45 flew in a new configuration called “QL.”
  • In this configuration, the rocket is fitted with four longer versions of strap-on motors that provide the vehicle the required additional thrust.
    
    
  • Earlier, the rocket used to be in “XL” version with six strap-on motors or two or with no strap-on motors known as core alone configuration.