[1] The IRS-1E satellite which was proposed to be launched was derived from the engineering model of IRS-1A incorporating a similar camera and an additional German-built monocular electro-optical stereo scanner.
[4] The mission was supported by ISRO Telemetry, Tracking and Command Network of ground stations located at Bangalore, Sriharikota, Lucknow, Mauritius, Bearslake, Russia and Biak, Indonesia.
After its integration in the Vehicle Assembly Building, the PSLV-C6 was transported on rails to the Umbilical Tower (UT) located one km away using the Mobile Launch Pedestal where the final operations were carried out.
Then the six nano satellites belonging to a cluster called Nanosatellite Launch System-4 (NLS-4) were injected into orbit at intervals of 20 seconds each.
[14] mRESINS (mini Redundant Strapdown Inertial Navigation System) bolted to the vehicle's fourth stage, have tested avionics for future PSLV missions.
[citation needed] PSLV C29 lifted off from the First Launch Pad (FLP) of SDSC SHAR at 18:00 [IST] on 16 December 2015.
After fourth stage engines were cut off primary payload TeLEOS-1 was injected in orbit at about 18 minutes 12 seconds after lift-off.
[19] 67 minutes into flight fourth stage re-ignition capability was demonstrated successfully by firing its engines for duration of nearly five seconds.
A video imaging system was also on-board, consisting of five cameras which captured and live streamed various staging events.
The previous record was held by Russia, which in 2014 catapulted 37 satellites in a single launch, using a modified Intercontinental ballistic missile (ICBM).
Anomalous interaction between the primary and secondary pressure regulators of the fourth stage caused a reduction in propellant flow and thrust after 250 seconds of burn time.
As a result, the fourth stage was shut down by a software override timer after burning 435 seconds, before reaching the target orbit or depleting propellant.
[39] Initially, a leak of helium gas from one of the components in the fourth stage was suspected,[40][41] similar to recent Long March 3 launch failure, but later ruled out.
[43] After fourth stage engine cut off IRNSS-1H separation occurred, leaving it adrift inside the closed payload fairing.