ISRO’s commercial arm Antrix Corporation has signed to launch three satellites of UK-based Surrey Satellite Technology for disaster monitoring constellation project aboard the launch vehicle PSLV scheduled on July 10.
The Indian Space Research Organisation (ISRO) said the three satellites — DMC 1, 2 and 3 — would be launched onboard PSLV C-28 on July 10 from the first launch pad of Satish Dhawan Space Centre at Sriharikota, while the date may vary depending upon the weather condition, while the launch window was being worked out.
ISRO’s commercial arm Antrix Corporation had, in February last year, signed a services agreement with the SSTL for the launch of these satellites. Antrix offers commercial satellite launch services through its two proven launch vehicles – PSLV and GSLV and so far, PSLV has launched a total of 25 satellites for foreign customers under commercial agreements, demonstrating its multi-satellite launch capability.
PSLV Vehicle Specifications
Height : 44 m
Diameter : 2.8 m
Number of Stages : 4
Lift Off Mass : 320 tonnes (XL)
Variants : 3 (PSLV-G, PSLV – CA, PSLV – XL)
First Flight : September 20, 1993
Payload to SSPO: 1,750 kg – PSLV earned its title ‘the Workhorse of ISRO’ through consistently delivering various satellites to Low Earth Orbits, particularly the IRS series of satellites. It can take up to 1,750 kg of payload to Sun-Synchronous Polar Orbits of 600 km altitude.
Payload to Sub GTO: 1,425 kg – Due to its unmatched reliability, PSLV has also been used to launch various satellites into Geosynchronous and Geostationary orbits, like satellites from the IRNSS constellation.
Fourth Stage: PS4 – The PS4 is the uppermost stage of PSLV, comprising of two Earth storable liquid engines.
Engine : 2 x PS-4
Fuel : MMH + MON
Max. Thrust : 7.6 x 2 kN
Third Stage: PS3 – The third stage of PSLV is a solid rocket motor that provides the upper stages high thrust after the atmospheric phase of the launch.
Fuel : HTPB
Max. Thrust : 240 kN
Second Stage: PS2 – PSLV uses an Earth storable liquid rocket engine for its second stage, know as the Vikas engine, developed by Liquid Propulsion Systems Centre.
Engine : Vikas
Fuel : UDMH + N2O4
Max. Thrust : 799 kN
First Stage: PS1 – PSLV uses the S139 solid rocket motor that is augmented by 6 solid strap-on boosters.
Engine : S139
Fuel : HTPB
Max. Thrust : 4800 kN
Strap-on Motors – PSLV uses 6 solid rocket strap-on motors to augment the thrust provided by the first stage in its PSLV-G and PSLV-XL variants. However, strap-ons are not used in the core alone version (PSLV-CA).
Fuel : HTPB
Max. Thrust : 719 kN
PSLV Launches Till Date
Title Launch Date Launcher Type Orbit Payload
PSLV-C27 Mar 28, 2015 PSLV-XL GSO
PSLV-C26 Oct 16, 2014 PSLV-XL GTO IRNSS 1C
PSLV-C23 Jun 30, 2014 PSLV-CA GTO
PSLV-C24 Apr 04, 2014 PSLV-XL GTO IRNSS-1B
PSLV-C25 Nov 05, 2013 PSLV-XL HEO Mars Orbiter Mission Spacecraft
PSLV-C22 Jul 01, 2013 PSLV-XL GTO IRNSS-1A
PSLV-C20 Feb 25, 2013 PSLV-CA SSPO SARAL
PSLV-C21 Sep 09, 2012 PSLV-CA SSPO
PSLV-C19 Apr 26, 2012 PSLV-XL SSPO RISAT-1
PSLV-C18 Oct 12, 2011 PSLV-CA SSPO Megha-Tropiques