stage and a two-thrust chambered, step-throttled second stage, the SLV has a lift off mass exceeding 26 tons. The first stage consists of a lengthened up-rated Shahab-3C. According to the technical documentation presented in the annual meeting of the United Nations Office for Outer Space Affairs, it is a two-stage rocket with all liquid propellant engines. The first stage is capable of carrying the payload to the maximum altitude of 68 kilometers. The Safir-1B is the second generation of Safir SLV and can carry a satellite weighing 60 kg into an elliptical orbit of 300 to 450 km. The thrust of the Safir-1B rocket engine has been increased from 32 to 37 tons. Simorgh SLV In 2010, a more powerful rocket named Simorgh was built. Its mission is to carry heavier satellites into orbit. The Simorgh rocket is long, and has a mass of 77 tonnes (85 tons).[4] Its first stage is powered by four main engines, each generating up to of thrust, plus a fifth which will be used for attitude control, which provides an additional . At liftoff, these engines will generate a total of of thrust. Simorgh is capable of putting a 350-kilogram (770 lb) payload into a low Earth orbit. In 2015, Israeli media reported the missile is capable of taking a crewed spacecraft or satellite into space. The first flight of the Simorgh rocket occurred on 19 April 2016. Zuljanah SLV On February 1, 2021, Iran said it successfully tested its latest satellite launch vehicle named "Zuljanah" which is capable of carrying satellites weighing up to 220 kg into a 500 km orbit. The SLV has three stages and is equipped with 2 solid fuel engine stages and a last liquid fuel stage, with the first and second stages having 75 tons of thrust each. Qoqnoos SLV On 2 February 2013, the head of the Iranian Space Agency, Hamid Fazeli mentioned that the new satellite launch vehicle, Qoqnoos will be used after the Simorgh SLV for heavier payloads. Soroush 1 & 2 SLV ISA has plans to build SLVs (named "Soroush" 1 & 2) in the future with a capacity to place 8 tons and 15 tons payloads in space (i.e. 200 km orbit) respectively. Launch history Orbital launches On 17 August 2008, Iran proceeded with the second test launch of a two-stage Safir SLV from a site south of Semnan city in the northern