PSLV-C31/irnSS-1e miSSiOn

PSLV-C11 PSLV-C17 PSLV-C19 CHANDRAYAAN-1 MISSION GSAT-12 MISSION RISAT-1 MISSION 22-10-2008 15-07-2011 26-04-2012 PSLV-XL missions - Heritage PSLV-XL

PSLV-C22 PSLV-C25 PSLV-C24 IRNSS-1A MISSION MARS ORBITER MISSION IRNSS-1B MISSION 01-07-2013 05-11-2013 04-04-2014

PSLV-C26 PSLV-C27 PSLV-C28 PSLV-C30/ IRNSS-1C MISSION IRNSS-1D MISSION DMC3 MISSION ASTROSAT MISSION 16-10-2014 28-03-2015 10-07-2015 28-09-2015 PSLV-C31/irnSS-1e miSSiOn PSLV-C31/irnSS-1e miSSiOn

PSLV-C31 is identifi ed as an Eastward mission carrying IRNSS-1E, the 5th Navigation Satellite of Indian Regional Navigation Satellite System to a sub-Geosynchronous Transfer Orbit of 284 km x 20650 km with an inclination of 19.2°. This is the 11th mission using PSLV-XL confi guration Vehicle. PSLV-C31 launch is from Second Launch Pad (SLP), SDSC, SHAR. The previous mission of PSLV from SLP was PSLV-C27/IRNSS-1D. In SLP, the Vehicle stacking and Satellite assembly are carried out at Vehicle Assembly Building (VAB). Subsequent to closure of Payload Fairing and integrated checks, the Launch Vehicle is moved to launch pad for fi nal countdown and launch.

PSLV-C31 Vehicle Characteristics Vehicle Height 44.4 m Lift-off Mass 321 t Propulsion Stages First Stage 6PSOM-XL+S139 Second Stage PL40 IRNSS-1E Third Stage HPS3 Fourth Stage L2.5

PSLV-C31 Mission Specifi cations Apogee 20650 ± 675 km Perigee 284 ± 5 km Inclination 19.2 ± 0.2° Argument of Perigee 178.2 ± 0.2° Launch Pad SLP Launch Azimuth 104° Payload Accommodation in PSLV-C31

PSLV-C31 Stages at a Glance

Stage 1 PSOM-XL Stage 2 Stage 3 Stage 4 (PS1) (PS2) (HPS3) (PS4) Length (m) 20 12 12.8 3.6 3.0 Diameter (m) 2.8 1 2.8 2 1.34 Propellant Solid Solid Liquid Solid Liquid

(HTPB based) (HTPB based) (UH25 + N2O4) (HTPB based) (MMH+MON3) Propellant Mass (t) 138.2 12.2 42 7.6 2.5

PSLV-C31 Vehicle Confi guration (6PSOM-XL+S139+PL40+HPS3+L2.5) PSLV-C31/irnSS-1e miSSiOn IRNSS-1E Separation

Cut-off of PS4

Iginition of PS4

Separation of HPS3

Ignition of HPS3

Separation of PS2

Separation of Payload Fairing

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 PSLV-C31 Flight Sequence PSLV-C31 Iginition of 4 Ground-lit PSOMs

PSLV-C31 Flight Events Events Time (s) Local Altitude (km) Inertial Velocity (m/s) RCT Ignition -3.00 0.025 451.92 PS1 Ignition 0.00 0.025 451.92 PSOM XL 1,2 (GL) Ignition 0.42 0.025 451.92 PSOM XL 3,4 (GL) Ignition 0.62 0.025 451.92 PSOM XL 5,6 (AL) Ignition 25.00 2.695 617.74 PSOM XL 1,2 (GL) Separation 69.90 23.619 1454.23 PSOM XL 3,4 (GL) Separation 70.10 23.746 1459.05 PSOM XL 5,6 (AL) Separation 92.00 39.798 2078.00 PS1 Separation 110.94 56.019 2397.18 PS2 Ignition 111.14 56.184 2396.68 CLG Initiation 116.50 60.508 2428.84 Payload Fairing Separation 198.14 111.966 3590.86 PS2 Separation 262.96 134.062 5372.61 PS3 Ignition 264.16 134.291 5372.20 PS3 Separation 606.20 186.222 7735.99 PS4 Ignition 616.20 188.037 7733.84 PS4 Cut-off 1123.34 451.490 9641.24 IRNSS-1E Separation 1160.34 503.274 9601.19 PSLV-C31/irnSS-1e miSSiOn

irnSS-1e Satellite

IRNSS-1E Satellite is the fi fth in the Phase-1 constellation of Indian Regional Navigation Satellite System (IRNSS), consisting of seven satellites. IRNSS-1E is I-1K Bus based satellite which has a lift off mass of 1425 kg. This satellite is similar to that of the previously launched satellites viz. IRNSS-1A, 1B, 1C and 1D. This is a navigation satellite realized to provide navigation solution in a constellation with land coverage over India and spreading around 1500 km around Indian main land.

IRNSS-1E 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.

PAYLOADS

• Navigation payloads

The navigation payloads work in L5 and S bands, 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-1E Stowed view

IRNSS Constellation

Orbital slots Satellites Altitude (km) Inclination (deg) Position IRNSS-1A 36000 29 55°E IRNSS-1B 36000 29 55°E IRNSS-1C 36000 5 83°E IRNSS-1D 36000 29 111.75°E IRNSS-1E 36000 29 111.75°E IRNSS-1F 36000 5 34°E IRNSS-1G 36000 5 131.5°E PSLV-C31/irnss-1e mISSION Glimpses of

CBS+NES Movement to VAB CBS+NES Stacking PS1 Segment Stacking

PS3+PS4 Module Preparation PS3+PS4 Module Stacking Satellite Assembly to Vehicle PSLV-C31/irnss-1e mISSION Pre-Launch Operations

PSOM-XL Preparation PSOM-XL Stacking PS2 Stacking

Integrated Vehicle at VAB Vehicle Movement to Launch Pad Vehicle at Launch Pad PSLV-C31/irnSS-1e miSSiOn Satellites Launched by PSLV

Sl. Sl. Mission Satellite Launch Date Mission Satellite Launch Date No. No. 1 PSLV-D2 IRS-P2 15-10-1994 45 PSLV-C16 Resourcesat-2 20-04-2011 2 PSLV-D3 IRS-P3 21-03-1996 46 PSLV-C16 Youthsat 20-04-2011 3 PSLV-C1 IRS-1D 29-09-1997 47 PSLV-C16 XSAT 20-04-2011 4 PSLV-C2 IRS-P4/Oceansat-1 26-05-1999 48 PSLV-C17 GSAT-12 15-07-2011 5 PSLV-C2 DLR-TUBSat 26-05-1999 49 PSLV-C18 Megha-Tropiques 12-10-2011 6 PSLV-C2 KITSAT-3 26-05-1999 50 PSLV-C18 Jugnu 12-10-2011 7 PSLV-C3 Technology 51 PSLV-C18 SRMSat 12-10-2011 Experiment Satellite (TES) 22-10-2001 52 PSLV-C18 Vesselsat-1 12-10-2011 8 PSLV-C3 BIRD 22-10-2001 53 PSLV-C19 RISAT-1 26-04-2012 9 PSLV-C3 PROBA 22-10-2001 54 PSLV-C21 SPOT-6 09-09-2012 10 PSLV-C4 METSAT/Kalpana-1 12-09-2002 55 PSLV-C21 PROITERES 09-09-2012 11 PSLV-C5 Resourcesat-1/IRS-P6 17-10-2003 56 PSLV-C20 SARAL 25-02-2013 12 PSLV-C6 Cartosat-1 05-05-2005 57 PSLV-C20 SAPPHIRE 25-02-2013 13 PSLV-C6 HAMSAT 05-05-2005 58 PSLV-C20 NEOSSat 25-02-2013 14 PSLV-C7 Cartosat-2 10-01-2007 59 PSLV-C20 NLS8.1/UniBRITE 25-02-2013 15 PSLV-C7 Space Capsule Recovery 60 PSLV-C20 NLS8.2/BRITE 25-02-2013 Experiment (SRE-1) 10-01-2007 61 PSLV-C20 NLS8.3/AAUSat3 25-02-2013 16 PSLV-C7 LAPAN-TUBSat 10-01-2007 62 PSLV-C20 STRaND-1 25-02-2013 17 PSLV-C7 NANO PEHUENSAT-1 10-01-2007 63 PSLV-C22 IRNSS-1A 01-07-2013 18 PSLV-C8 AGILE 23-04-2007 64 PSLV-C25 Mars Orbiter Mission (MOM) 05-11-2013 19 PSLV-C10 TECSAR 21-01-2008 65 PSLV-C24 IRNSS-1B 04-04-2014 20 PSLV-C9 Cartosat-2A 28-04-2008 66 PSLV-C23 SPOT-7 30-06-2014 21 PSLV-C9 IMS-1/ TWSAT 28-04-2008 67 PSLV-C23 AISat 30-06-2014 22 PSLV-C9 CANX-2 28-04-2008 68 PSLV-C23 NLS7.1/CANX-4 30-06-2014 23 PSLV-C9 CUTE-1.7 28-04-2008 69 PSLV-C23 NLS7.2/CANX-5 30-06-2014 24 PSLV-C9 Delfi -C3 28-04-2008 70 PSLV-C23 VELOX-1 30-06-2014 25 PSLV-C9 AAUSat-II 28-04-2008 71 PSLV-C26 IRNSS-1C 16-10-2014 26 PSLV-C9 COMPASS-1 28-04-2008 72 PSLV-C27 IRNSS-1D 28-03-2015 27 PSLV-C9 SEEDS 28-04-2008 73 PSLV-C28 DMC3-1 10-07-2015 28 PSLV-C9 NLS 5/CANX-6 28-04-2008 29 PSLV-C9 RUBIN-8 28-04-2008 74 PSLV-C28 DMC3-2 10-07-2015 30 PSLV-C11 CHANDRAYAAN-1 22-10-2008 75 PSLV-C28 DMC3-3 10-07-2015 31 PSLV-C12 RISAT-2 20-04-2009 76 PSLV-C28 CBNT-1 10-07-2015 32 PSLV-C12 ANUSAT 20-04-2009 77 PSLV-C28 De-OrbitSail 10-07-2015 33 PSLV-C14 Oceansat-2/IRS-P4 23-09-2009 78 PSLV-C30 Astrosat 28-09-2015 34 PSLV-C14 Cubesat-1/UWE-2 23-09-2009 79 PSLV-C30 LAPAN-A2 28-09-2015 35 PSLV-C14 Cubesat-2/BeeSat 23-09-2009 80 PSLV-C30 NLS-14/EV9 28-09-2015 36 PSLV-C14 Cubesat-3/ITU-pSAT1 23-09-2009 81 PSLV-C30 LEMUR-1 28-09-2015 37 PSLV-C14 Cubesat-4/Swiss Cube 23-09-2009 82 PSLV-C30 LEMUR-2 28-09-2015 38 PSLV-C14 Rubin-9.1 23-09-2009 83 PSLV-C30 LEMUR-3 28-09-2015 39 PSLV-C14 Rubin-9.2 23-09-2009 84 PSLV-C30 LEMUR-4 28-09-2015 40 PSLV-C15 Cartosat-2B 12-07-2010 85 PSLV-C29 TeLEOS-1 16-12-2015 41 PSLV-C15 Studsat 12-07-2010 86 PSLV-C29 Kent Ridge-1 16-12-2015 42 PSLV-C15 Alsat-2A 12-07-2010 87 PSLV-C29 VELOX-CI 16-12-2015 43 PSLV-C15 NLS6.1/AISSat-1 12-07-2010 88 PSLV-C29 VELOX-II 16-12-2015 44 PSLV-C15 NLS6.2/TISat-1 12-07-2010 89 PSLV-C29 Athenoxat-1 16-12-2015 90 PSLV-C29 Galassia 16-12-2015 Indian Satellites Published by: Documentation and Information Services-LV Projects, Commercial Satellites VSSC, Thiruvananthapuram Design & Printing St. Joseph’s Press, TVPM.