PSLV-C41

Like its predecessor, IRNSS-1I has two types of payloads, navigation payload and the ranging payload. The navigation payload transmits navigation service signals to the users. This payload is operating in L5 band and S band. A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite.^[2] Failure of these Rubidium atomic clocks was the reason for IRNSS-1A to be deemed unfit. The satellite contains corner cube retroreflectors used for LASER ranging.

Launched on April 12, 2018,

• Ignition of the core stage, followed by the ignition of the six strap-ones.
• After 70 seconds, at an altitude of 23.6 km, the boosters separated.
• Core stage separated after 110 seconds, at an altitude of 55 km.
• At 203 seconds, at 113&km, second stage ignited.
• After the payload fairing, the second stage separated at an altitude of 131.5&km.
• At 264 seconds, 132 km, third stage ignited, followed by a third stage separation at 599 seconds and 183 km height.
• At 609 seconds, 185 km, fourth stage is ignited.
• At 454.4 km, fourth stage is cut off. Soon after, the satellite is injected into a sub geosynchronous transfer orbit, which is 284 km at perigee and 20650 km at apogee.^[3] The maneuver took place above the island of New Guinea.