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IRNSS-1G PSLV-C33/IRNSS-1G MISSIONPSLV-XL Accomplished Missions MISSION

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IRNSS-1G PSLV-C33/IRNSS-1G MISSIONPSLV-XL Accomplished Missions MISSION PSLV-C33/ IRNSS-1G PSLV-C33/IRNSS-1G MISSIONPSLV-XL Accomplished Missions MISSION PSLV-C11 PSLV-C17 PSLV-C19 PSLV-C22 CHANDRAYAAN-1 MISSION GSAT-12 MISSION RISAT-1 MISSION IRNSS-1A MISSION 22-10-2008 15-07-2011 26-04-2012 01-07-2013 PSLV-C25 PSLV-C24 PSLV-C26 PSLV-C27 MARS ORBITER MISSION IRNSS-1B MISSION IRNSS-1C MISSION IRNSS-1D MISSION 05-11-2013 04-04-2014 16-10-2014 28-03-2015 PSLV-C28 PSLV-C30 PSLV-C31 PSLV-C32 DMC3 MISSION ASTROSAT MISSION IRNSS-1E MISSION IRNSS-1F MISSION 10-07-2015 28-09-2015 20-01-2016 10-03-2016 PSLV-C33/IRNSS-1G MISSION PSLV-C33/ IRNSS-1G MISSION PSLV-C33 is an Eastward mission carrying IRNSS-1G (1431 kg), the 7th Navigation Satellite of Indian Regional Navigation Satellite System to a sub-Geosynchronous Transfer Orbit of 284 km x 20650 km with 17.86° inclination. This is the 35th launch of PSLV and is planned from First Launch Pad (FLP), SDSC, SHAR. IRNSS-1G is the last Satellite being launched in the phase-1 constellation of Indian Regional Navigation Satellite System. PSLV-C33 Vehicle Characteristics Vehicle Height 44.4 m Lift-off Mass 321 t Propulsion Stages First Stage 6PSOM - XL + S139 Second Stage PL40 Third Stage HPS3 IRNSS-1G Fourth Stage L2.5 PSLV-C33 Mission Specifi cations Apogee 20650 ± 675 km Perigee 284 ± 5 km Inclination 17.86° ± 0.2° Argument of Perigee 178.2° ± 0.2° Launch Pad FLP Launch Azimuth 102° Payload Accommodation in PSLV-C33 PSLV-C33 Stages at a Glance Stage 1 Stage 2 Stage 3 Stage 4 PS1 PSOM-XL (PS2) (HPS3) (PS4) Length (m) 20 12 12.8 3.6 3.0 Diameter (m) 2.8 1 2.8 2 1.34 Solid Solid Liquid Solid Liquid Propellant (HTPB based) (HTPB based) (UH25+N2O4) (HTPB based) (MMH+MON3) Propellant Mass (t) 138.2 12.2 42 7.6 2.5 PSLV-C33 Vehicle Confi guration (6PSOM-XL+S139+PL40+HPS3+L2.5) IRNSS-1G Separation Cut-off of PS4 PSLV-C33/IRNSS-1G MISSION Iginition of PS4 Separation of HPS3 Ignition of HPS3 PSLV-C33 Separation of PS2 Flight Separation of Payload Fairing Sequence Ignition of PS2 Separation of PS1 Separation of 2 Air-lit PSOMs Separation of 4 Ground-lit PSOMs Ignition of 2 Air-lit PSOMs Ignition of PS1 Iginition of 4 Ground-lit PSOMs PSLV-C33 Flight Events Events Time (s) Local Altitude (km) Inertial Velocity (m/s) RCT Ignition -3.00 0.024 451.89 PS1 Ignition 0.00 0.024 451.89 PSOM XL 1, 2 (GL) Ignition 0.42 0.024 451.89 PSOM XL 3, 4 (GL) Ignition 0.62 0.024 451.89 PSOM XL 5, 6 (AL) Ignition 25.00 2.694 616.32 PSOM XL 1, 2 (GL) Separation 69.90 23.623 1445.17 PSOM XL 3, 4 (GL) Separation 70.10 23.751 1449.94 PSOM XL 5, 6 (AL) Separation 92.00 39.887 2059.81 PS1 Separation 110.12 55.653 2395.16 PS2 Ignition 110.32 55.823 2394.65 CLG Initiation 115.50 60.128 2424.57 Payload Fairing Separation 199.92 112.610 3643.63 PS2 Separation 262.04 132.089 5373.89 PS3 Ignition 263.24 132.316 5373.49 PS3 Separation 663.20 190.632 7725.74 PS4 Ignition 673.20 192.225 7723.84 PS4 Cut-off 1182.02 446.676 9646.21 IRNSS-1G Separation 1219.02 497.807 9606.45 PSLV-C33/IRNSS-1G MISSION IRNSS-1G Separation IRNSS Constellation Indian Regional Navigation Satellite System (IRNSS) constellation is developed by ISRO to provide accurate position information to various users in the country. It will also operate in the regions located in 1500 km radius around India. The system is expected to provide position accuracy of better than 20 m. The services provided by IRNSS are : • Standard Positioning Service (SPS) to all users • Restricted Service (RS) to authorized users with encryption The applications of IRNSS include disaster management, vehicle tracking & fl eet management, integration with mobile phones, terrestrial navigation aid for travellers, visual & voice navigation for drivers and more. The Indian Regional Navigation Satellite System (IRNSS) consists of three segments viz. Space, Ground and User. The space segment consists of a constellation of seven Satellites in phase -1, which are positioned in the following orbital slots. • Four Satellites in a GeoSynchronous Orbit (GSO) with an altitude of 36,000 km and an inclination of 29° in the orbital position of 55° E and 111.75°E. • Three Satellites in the Geo Stationary Orbit (GEO) of 36,000 km with an inclination of 5.1° in the orbital position of 32.5°E, 83°E & 129.5°E PSLV-C33/IRNSS-1G MISSION IRNSS Ground Segment IRNSS ground segment consists of ground stations for generation & transmission of navigation parameters, Satellite control, Satellite ranging and monitoring. A total of 20 stations are being used and most of them are located at airports along with GAGAN ground elements. The constituent elements of the IRNSS ground segment are: • ISRO Navigation Centre (INC) at Byalalu, the nerve center of the IRNSS Ground Segment. INC primarily generates navigation parameters. • IRNSS Range and Integrity Monitoring Stations (IRIMS) perform continuous one way ranging of IRNSS Satellites. • IRNSS CDMA Ranging Stations (IRCDR) carryout precise two way ranging of IRNSS Satellites. • IRNSS Network Timing Centre (IRNWT) at Byalalu generates, maintains and distributes IRNSS Network Time. IRNSS-1G IRNSS-1G Satellite is the seventh in the Phase-1 constellation of Indian Regional Navigation Satellite System (IRNSS). IRNSS-1G is I-1K Bus based Satellite which has a lift off mass of 1431 kg. This Satellite is similar to that of the previously launched Satellites viz. IRNSS-1A,1B,1C,1D, 1E and 1F. IRNSS-1G structure uses standard I-1K CFRP sandwich central internal structure with all exposed Aluminium sandwich panels. This type of structure has good launch heritage in PSLV meeting the launch vehicle stiffness and strength requirement. The Satellite is powered by two solar arrays, which generate power up to 1,660 W and has a life-time of more than ten years. IRNSS-1G Stowed view PAYLOADS • Navigation payloads The navigation payloads work in L5 and S bands and employ dual helix antenna and transponders working in both bands. It employs Rubidium Atomic Frequency standard as the atomic clock which is the heart of the Satellite. • Ranging payload This is working in C band and used for meeting the ranging requirement of the Satellite. IRNSS CONSTELLATION PHASE-1 COMPLETION Satellites Mission Date of Launch IRNSS-1A PSLV-C22 01-07-2013 IRNSS-1B PSLV-C24 04-04-2014 IRNSS-1C PSLV-C26 16-10-2014 IRNSS-1D PSLV-C27 28-03-2015 IRNSS-1E PSLV-C31 20-01-2016 IRNSS-1F PSLV-C32 10-03-2016 IRNSS-1G PSLV-C33 28-04-2016 PSLV-C33/IRNSS-1G MISSION Glimpses of Pre-Launch Operations CBS+NES Movement CBS+NES Stacking PS1 Segment Stacking PSOM-XL Preparation PSOM-XL Stacking Stage 1 Assembly PSLV-C33/IRNSS-1G MISSION PS2 Movement to MST PS2 Stacking PS3+PS4 Module Preparation PS3+PS4 Module Stacking IRNSS-1G Testing Vehicle at Launch Pad Published by: Documentation and Information Services-LV Projects, VSSC, Thiruvananthapuram Designing & Printing St. Joseph’s Press, TVPM..
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