The Safir ( fa, سفیر, meaning "ambassador") was the first

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

ian expendable launch vehicle able to place a satellite in orbit. The first successful orbital launch using the Safir launch system took place on 2 February 2009 when a Safir carrier rocket placed the

Omid ''Omid'' ( fa, امید, meaning "Hope") was Iran's first domestically made satellite. Omid was a data-processing satellite for research and telecommunications; Iran's state television reported that it was successfully launched on 2 February 2009 ...

satellite into an orbit with a

apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion. General description There are two apsides in any el ...

. Making Iran the ninth nation capable of producing and launching a satellite. The

Simorgh Simurgh (; fa, سیمرغ, also spelled ''simorgh, simorg'', ''simurg'', ''simoorg, simorq'' or ''simourv'') is a benevolent, mythical bird in Persian mythology and Persian literature, literature. It is sometimes equated with other mythologica ...

is a larger orbital launcher based on Safir technology which has since replaced the Safir, and is sometimes called the Safir-2.

Design and specifications

The Safir measures 1.25 meters in diameter, 22 meters in height and has a launching mass of 26 tons. The rocket consists of two stages; The first stage utilizes an upgraded Nodong/

Shahab-3 The Shahab-3 ( fa, شهاب ۳, Šahâb 3; meaning "meteor-3") is a liquid-propelled medium-range ballistic missile (MRBM) developed by Iran and based on the North Korean Nodong-1. The Shahab-3 has a range of ; a MRBM variant can now reach (ca ...

type engine which burns a

hypergolic A hypergolic propellant is a rocket propellant combination used in a rocket engine, whose components spontaneously ignite when they come into contact with each other. The two propellant components usually consist of a fuel and an oxidizer. T ...

combination of

UDMH Unsymmetrical dimethylhydrazine (UDMH; 1,1-dimethylhydrazine, НДМГ or codenamed Geptil) is a chemical compound with the formula H2NN(CH3)2 that is used as a rocket propellant. It is a colorless liquid, with a sharp, fishy, ammonia-like smell ...

as fuel and

nitrogen tetroxide Dinitrogen tetroxide, commonly referred to as nitrogen tetroxide (NTO), and occasionally (usually among ex-USSR/Russia rocket engineers) as amyl, is the chemical compound N2O4. It is a useful reagent in chemical synthesis. It forms an equilibrium ...

as oxidant, producing 37 tons (363 kN; 82,500 lbf) of thrust. The second stage utilizes a pair of smaller engines (originally the

Vernier engines A vernier thruster is a rocket engine used on a spacecraft for fine adjustments to the attitude or velocity of a spacecraft. Depending on the design of a craft's maneuvering and stability systems, it may simply be a smaller thruster complementi ...

of the R-27 Zyb Soviet

SLBM A submarine-launched ballistic missile (SLBM) is a ballistic missile capable of being launched from submarines. Modern variants usually deliver multiple independently targetable reentry vehicles (MIRVs), each of which carries a nuclear warhea ...

) burning the same fuel combination as the first stage and producing 3.5 tons (35 kN; 7700 lbf) of thrust. This configuration gives Safir the ability to inject a payload with a maximum weight of 50 kilograms into low-earth orbit. Safir Launch Pad

Variants

Kavoshgar-1

''Kavoshgar-1'' ( fa, کاوشگر ۱, "Explorer-1") was Safir's precursor used as a

sounding rocket A sounding rocket or rocketsonde, sometimes called a research rocket or a suborbital rocket, is an instrument-carrying rocket designed to take measurements and perform scientific experiments during its sub-orbital flight. The rockets are used to ...

, a sub-orbital flight was conducted on 4 February 2008, as announced by state-run television. A launch on 25 February 2007 may also have been of the same type. The flight carried instruments to measure the higher

atmosphere An atmosphere () is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A ...

. The rocket launched on 4 February 2008 was a liquid-propellant-driven rocket, a derivative of the

, that reached an altitude of 200–250 km in

space Space is the boundless three-dimensional extent in which objects and events have relative position and direction. In classical physics, physical space is often conceived in three linear dimensions, although modern physicists usually consi ...

, and successfully returned science data according to the Iranian News Agency. On 19 February 2008, Iran offered new information about the rocket and announced that ''Kavoshgar-1'' used a two staged rocket. The first stage separated after 100 seconds and returned to earth with the help of a parachute. The second stage continued its ascent to an altitude of 200 kilometers.

Safir-1A

The Safir-1A is the first upgraded variant of the original Safir, these upgrades include, refinement of the second stage retro-rockets, stage separation systems, various sensors and

telemetry Telemetry is the in situ collection of measurements or other data at remote points and their automatic transmission to receiving equipment (telecommunication) for monitoring. The word is derived from the Greek roots ''tele'', "remote", an ...

systems, navigation and control systems, as well as increasing maximum orbit height from 250 to 275 kilometers.

Safir-1B

The Safir-1B is a further upgrade of the Safir-1A design, the first-stage engine has been upgraded and refined, resulting in an increase in thrust from 32 to 37tons (363 kN; 82,500 lbf), the second stage engine has been upgraded with

thrust vector control Thrust vectoring, also known as thrust vector control (TVC), is the ability of an aircraft, rocket, or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) to control the attitude or angular velocity of the ve ...

capability and has been made more efficient. These upgrades have increased payload capability to 50 kilograms, and have increased maximum orbit height to 400 kilometers.

Retirement

During the unveiling ceremony of the

Zuljanah {{unreferenced, date=October 2015 Zuljanah ( ar, ذو الجناح) was a grey Arabian Stallion that belonged to Husayn ibn Ali. He was bred and raised by Muhammad. Zuljanah was known to be very loyal and was famous for his strength, endurance and ...

satellite launch vehicle on the state TV, Seyed Ahmad Husseini, the spokesman of the Ministry of Defense's Aerospace Organization stated that the Safir Launch vehicle is in a state of retirement and no further launches are planned with this vehicle.

Launch history

Safir has made eight launches so far, putting 4 satellites into orbit. 2019-08-29 Safir launch failure

Gallery

File:Safir navid 2.jpg, 2012 launch of navid satellite File:Omid 0650.jpg, Safir at an exhibition at the Mosalla of Tehran File:Omid 0658.jpg, Safir first-stage engine