Mission

Navigation Satellite

Payload

• Navigation payload in S band and L5 band
• CDMA ranging payload in C band
• Rubidium Atomic Frequency Standard

Orbit / location

Geo-synchronous orbit / 55° East longitude
Inclination 29⁰

Mission life

>10 years

Platform             

I-1K

Cuboid Size

1.800 x 1.626 x 1.743 metre cuboid

Dry Mass            

594.35 Kg

Lift - off Mass

1425.6  Kg

Power

1671 W
Two sided array - each array with one panels of size 2.15 m x 1.8 m -populated with multi-junction solar cells ; 1 x 90 Ah Li Ion battery

Control System

Zero  momentum biased system with  AOCE,  star sensors, sun sensors, reaction wheels (tetrahedral configuration), magnetic torquers and  thrusters

Propulsion System

Bipropellant system with 12 thrusters configuration - all 22N thrusters and one 440N Liquid Apogee Motor (LAM);  390 litres propellant tanks - 2 nos. & 67 litre CFRP overwrap Titanium liner pressurant tank - 1 no.

TTC System

CCSDS Type C-band  Telemetry, Tracking & Command Systems

Special Features /New Technologies

• Dual 1553 Bus concept
• Dual Helix Array Antenna (dia. 1.1m) in L5 and S bands
• Yaw flipping maneuver
• High power 250 W TWTA in S band
• Atomic clock
• Corner Cube Retro Reflector for Laser Ranging

Launch 

IRNSS 1H launch on August 31,2017 onboard PSLV C39 - Unsuccessful