26-617: The SSLV-D2 was the second mission of the Small Satellite Launch Vehicle (SSLV). The vehicle carried three payloads: EOS–07 , Antaris US Firm named as Janus-01 and AzaadiSAT-2 by SpaceKidz India. ISRO launched the Small Satellite Launch Vehicle (SSLV) in Low Earth orbit , on 10th February 2023 from the first launchpad of Satish Dhawan Space Centre in Sriharikota . It contained three payloads having
52-461: A National Institute of Advanced Studies report by Rajaram Nagappa proposed development path of a 'Small Satellite launch Vehicle-1' to launch strategic payloads. In National Space Science Symposium 2016, then Director of Liquid Propulsion Systems Centre , S. Somanath also acknowledged a need for identifying a cost effective launch vehicle configuration with 500 kg payload capacity to LEO and by November 2017, development of such launch vehicle
78-548: A circular orbit around 13 minutes after liftoff. Also, Janus-1 and AzaadiSAT-2 satellites into their orbits about 1.6 minutes later. The purpose of SSLV-D2 is to launch the three satellites into a 450-kilometer circular orbit and showcase the in-flight performance of the SSLV vehicle systems. A total of 175.2 kilograms was carried by the SSLV-D2: 10.2 kg for Janus-1, 8.7 kg for AzaadiSAT-2, and 156.3 kg for EOS-07. After analyzing
104-494: A team of 6 people, and the possibility of launch on demand, SSLV is now a cost-effective solution. Repeatable flight performance of the SSLV vehicle systems has also been demonstrated by SSLV-D3. The successful flight of SSLV-D3 permits the Indian private sector and NewSpace India Limited to use the rocket for operational flights. The SSLV Project was completed after more than seven years of construction. Six companies are now in
130-467: A total mass of 172.6 kg. This was the follow-up mission of SSLV-D1 with main objectives to demonstrate in-flight performance of SSLV vehicle systems and injection of all three satellites into 450 km low Earth orbit . The second SSLV development launch was carried out on 10th February, 2023 from the first launchpad of Satish Dhawan Space Centre in Sriharikota . Small Satellite Launch Vehicle The Small Satellite Launch Vehicle ( SSLV )
156-422: Is a small-lift launch vehicle developed by ISRO to deliver 500 kg (1,100 lb) payload to low Earth orbit (500 km (310 mi)) or 300 kg (660 lb) payload to Sun-synchronous orbit (500 km (310 mi)). The rocket supports multi-orbital drop-offs capability for small satellites . The maiden flight SSLV-D1 was conducted from First Launch Pad on 7 August 2022, however,
182-849: Is derived from third stage (HPS3) of PSLV . Vehicle characteristics : Payloads capabilities The early developmental flights and those to inclined orbits will launch from Sriharikota , at first using existing launch pads and later from dedicated facility called SSLV Launch Complex (SLC) in Kulasekharapatnam . Tenders related to manufacturing, installation, assembly, inspection, testing and Self Propelled launching Unit (SPU) were released in October 2019. This new Kulasekarapattinam Spaceport , under development, near Kulasekharapatnam in Tamil Nadu will handle SSLV launches to Sun-synchronous orbit when complete. In 2015,
208-453: Is now officially complete. The development team will continue to search for specific operational activities in the VTM stage before ISRO supplies the industry with SSLV technology for serial production. Any necessary fine-tuning will be finished prior to the technology transfer. With a 72-hour turnaround time, the ability to support several satellites, a small launch infrastructure requirement with
234-742: The Satish Dhawan Space Centre , one of the two satellite launch centres in India (the other being Thumba Equatorial Rocket Launching Station , Thiruvananthapuram ). Indian Space Research Organisation (ISRO) launches satellites using multistage rockets such as the Polar Satellite Launch Vehicle and the Geosynchronous Satellite Launch Vehicle from Sriharikota. Sriharikota was selected by ISRO because of its proximity to
260-534: The mass production and launch activities. The SSLV was developed with the aim of launching small satellites commercially at drastically reduced price and higher launch rate compared to Polar Satellite Launch Vehicle (PSLV). The development cost of SSLV is ₹ 169.07 crore (equivalent to ₹ 190 crore or US$ 23 million in 2023) and the manufacturing cost is expected to be ₹ 30 crore (US$ 3.6 million) to ₹ 35 crore (US$ 4.2 million). According to analysts, this places it among
286-451: The ISRO for the mission failure was software malfunction. According to the ISRO, the mission software detected an accelerometer anomaly during the second stage separation. This caused the rocket navigation to switch from a closed loop guidance to an open loop guidance. Even though, this switch in guidance mode was part of the redundancy built into the rocket's navigation, it could not salvage
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#1732790114294312-467: The SS1 first-stage booster conducted on 18 March 2021 was unsuccessful. About 60 seconds into the test, oscillations were observed and after 95 seconds, the nozzle of SS1 stage disintegrated. The nominal duration of test was 110 seconds. To qualify for flight, SSLV's solid first stage SS1 has to perform two consecutive nominal static fire tests . The SSLV Payload Fairing (SPLF) functional qualification test
338-680: The VTM stage had to fire for at least 20 seconds, to impart enough additional orbital velocity and altitude corrections. Instead the VTM kicked-in at 653.5s and shut itself down at 653.6s, post lift-off. Following the partial firing of the VTM stage, the EOS 02 was released at 738.5s and AazadiSAT at 788.4s, post-liftoff. These failures transpired, resulting in the satellites entering an unstable orbit and subsequently destroyed upon reentry. On 10 February 2023, SSLV completed its second developmental mission, putting three satellites into their planned orbits. The three-stage rocket successfully launched EOS-07 into
364-733: The equator, it gives extra centripetal force from the rotation of Earth. Sriharikota is partly located in Sullurpeta mandal and partly located in Tada mandal in Tirupati District in Andhra Pradesh . The island separates Pulicat Lake from the Bay of Bengal . The nearest town and railway station is Sullurpeta which is 16 km west of Sriharikota and nearest city is Tirupati . A 16 km elevated road connects Sriharikota to
390-599: The existing PSLV and Geosynchronous Satellite Launch Vehicle (GSLV) and horizontally like the retired Satellite Launch Vehicle (SLV) and Augmented Satellite Launch Vehicle (ASLV). The first three stages of the vehicle use HTPB based solid propellant, with a fourth terminal stage being a Velocity-Trimming Module (VTM) with eight 50 N thrusters for reaction control and eight 50 N axial thrusters for changing velocity. With these VTM can add delta-v of up to 172 m/s. The first stage (SS1) and third stage (SS3) of SSLV are newly developed while second stage (SS2)
416-515: The launch vehicle's new, affordable guidance and navigation system. The Earth Observation Satellite EOS-08 was launched by ISRO on 16 August 2024, using SSLV-D3. At the Satish Dhawan Space Centre , the final development flight successfully took off from the first launch pad . After seventeen minutes, the EOS-08 was injected into a 475 km circular orbit, following the instructed injection conditions without any deviations. The SSLV development process
442-452: The mission. During the open loop guidance mode, the final VTM stage only managed to fire for 0.1s instead of the intended 20s. This led to the two satellites as well as the VTM stage of the rocket being injected into an unstable elliptical transatmospheric orbit of 360.56×75.66 km with an inclination of 36.56°. The SSLV-D1's final VTM stage had 16 hydrazine ( MMH + MON3 ) fueled thrusters. Eight of those were to provide altitude control and
468-439: The most affordable rockets in its class. The projected high launch rate relies on largely autonomous launch operation and on overall simple logistics. To compare, a PSLV launch involves 600 officials while SSLV launch operations would be managed by a small team of about six people. The launch readiness period of the SSLV is expected to be less than a week instead of months. The launch vehicle can be assembled both vertically like
494-433: The payload failed to reach the intended orbit. The second flight SSLV-D2 was successful in delivering payload into orbit on 10 February 2023. SSLV is made keeping low cost, low turnaround time in mind with launch-on-demand flexibility under minimal infrastructure requirements. It is capable of carrying multiple satellites. Once SSLV is operational, NewSpace India Limited (NSIL) and a group of Indian companies will manage
520-449: The problems with SSLV-D1, ISRO chose the necessary remedial measures and put them into practice. The development team conducted a number of simulations and studies to make sure that SSLV-D2 mission would succeed. According to SSLV-D1 fault evaluation study, six onboard accelerometers detected vibrations that were longer in duration and more intense during the second stage of separation. In order to ensure that this problem doesn't occur again,
546-498: The process of acquiring the SSLV technology, while at least ten companies and consortia have expressed interest in manufacturing. The integration and launch time of SSLV rocket is less than 24 hours. Sriharikota Sriharikota ( Telugu: [ʃriːhɐɾikoːʈɐ] ) is a barrier island off the Bay of Bengal coast located in the Shar Project settlement of Tirupati district in Andhra Pradesh , India. It houses
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#1732790114294572-460: The remaining eight for controlling the orbital velocity. The VTM stage also provided pitch, yaw and roll control during the orbital insertion maneuvers. The three main stages of the SSLV-D1 functioned normally. But, that was not enough to impart adequate impulse for the two satellite payloads to achieve stable orbits. For the injection of the two satellite payloads into their intended stable orbits,
598-505: The rocket was 34m tall with a diameter of 2m and a lift-off mass of 120t. The rocket carried EOS 02 , an Earth observation satellite that weighed 135 kg and AzaadiSAT , a CubeSat payload that weighed 8 kg, developed by Indian students to promote inclusivity in STEM education. The SSLV-D1 was supposed to place the two satellite payloads in a circular orbit of altitude 356.2 km with 37.2° inclination. The official explanation by
624-527: The second stage detachment system in SSLV-D2 was modified to reduce vibrations. Furthermore, the system was redesigned to navigate utilizing NavIC data and readings will now be monitored for a longer time before entering rescue mode. The separation mechanism, the equipment bay, and the on-board system for identifying malfunctioning sensors were further modified and five new pieces of hardware were installed. The electronics in SSLV-D2 worked successfully, as did
650-510: Was completed in August 2021. The second static fire test of SSLV first stage SS1 was conducted on 14 March 2022 at SDSC-SHAR and met the required test objectives. The first developmental flight of the SSLV occurred on 7 August 2022. The flight mission was named SSLV-D1 . The SSLV-D1 flight failed to achieve its mission objectives. The rocket had a three stage configuration with a fourth Velocity Trimming Module (VTM). In its D1 configuration,
676-713: Was underway. By December 2018, the Vikram Sarabhai Space Centre (VSSC) completed the design for the vehicle. The aerodynamic characterization research was conducted at the National Aerospace Laboratories ' 1.2m Trisonic Wind Tunnel Facility. In December 2020, all booster segments for SSLV first stage (SS1) static test (ST01) were received and assembly was done in Second Vehicle Assembly Building (SVAB). The first static fire test (ST01) of
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