Rehbar-I

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Rehbar-I
Nike-cajun.jpg
A Rehbar-I Nike-Cajun in launch position in 1961 at Sonmiani
Function Medium expendable Satellite Launch vehicle
Manufacturer SUPARCO
NASA
Country of origin  Pakistan
 United States
Size
Height 7.70 m (130 Km)
Diameter 42 cm (42.45 cm)
Stages 2
Capacity
Payload to LEO 80 Kg
Payload to
GTO
(80 Kg)
Associated rockets
Derivatives Dragon Rocket Series, Shahpar Rocket Series
Launch history
Status Retired
Launch sites Sonmiani Satellite Launch Center
Total launches 4
Successes 4
Failures None
Partial failures None
First flight I: 7 June 1961
IIA: 11 June 1962
III: 18 March 1964
Last flight XX: 13 February 1969
XXIII: 7 April 1972
XXIV: 8 April 1972
Notable payloads Weather Observatory
Boosters (Rehbar-I)
No. boosters 2
Engines 1 Solid
Thrust 246.3 kN (107,530 lbf)
Specific impulse 3.0 sec
Burn time 2.8 seconds
Fuel Solid
Boosters ()
No. boosters 1
Engines
Thrust
Burn time
Fuel LOX/RP-1
First stage
Engines 1 RS-58-OSA
Thrust 249 kN
Specific impulse 3 sec
Burn time 2 seconds
Fuel RP-1/LOX
Second stage - Nike Cajun
Engines 2 RL-10A
Thrust 147 kN (41,592 lbf)
Specific impulse 4 sec
Burn time 3 seconds
Fuel LH2/LOX

Rehbar was series of sounding rocket launches into the upper atmosphere and the edge of space. Rehbar-I was the first rocket launched by the Space and Upper Atmosphere Research Commission (SUPARCO), on 7 June 1962.[1] Rehbar-I was a two-staged Solid fuel rocket.

Various Rehbar Sounding rocket models were launched 200 times between 1961 and 1972. The Rehbar Sounding Rockets are no longer in services of SUPARCO. Rehbar is an Urdu Language word which literary means "One who leads the way".

Description[edit]

In 1960, President John F. Kennedy challenged US scientists to land Americans on the moon and bring them back safely to earth, before the decade was out. NASA rose to the occasion and achieved this staggering task with the landing of Apollo 11 on the moon in 1969.

In 1961, NASA realized that the Indian Ocean region was a black hole of data relating to the wind structure of the upper atmosphere which was badly needed for NASA's satellite/Apollo programs. NASA offered all countries on the littoral of the Indian Ocean help to establish rocket ranges in order to obtain such data on condition of fully sharing it with NASA. President Ayub Khan accompanied by his Chief Scientific Advisor Prof. Abdus Salam were on a state visit in the U.S at the time. Pakistan seized the offer and Prof. Abdus Salam invited Pakistan Atomic Energy Commission's (PAEC) senior engineer Tariq Mustafa to join him in meeting with NASA officials in September 1961 to finalize the arrangement and Pakistan was the first country to take up the offer.

The Rehbar sounding rocket program was built around the U.S Nike-Cajun/Apache rockets carrying sodium vapor and experiments to measure the wind velocities and wind shears in the upper atmosphere. The 5-member team responsible for this pioneering program was led by Tariq Mustafa and included Salim Mehmud and Sikander Zaman both of whom later became Chairmen of SUPARCO.

Rehbar-1 was launched on June 7, 1962. In a period of nine months; the Pakistani team was established, their training completed in US facilities, the rocket range equipment and instrumentation procured, the scientific payloads selected, construction of the rocket range at Sonmiani completed and the first rocket successfully launched. This was a unique achievement that even surprised NASA's specialists. Pakistan was the first amongst all developing (including Brazil, China and India) and Islamic countries to carry out a scientific rocketry program.

The Rehbar-I successful launch carried a payload of 80 pounds of sodium and it streaked up about 130 km into the atmosphere. The Rehbar-I was a two-stage rocket with all solid-propellant motors. The first launch of the Rehbar-I took place in Sonmiani on June 7, 1961.

Achievements[edit]

The Rehbar rocket series was an experimental rocket program which later played an important role in Pakistan's development of a missile program. Throughout the 1960s till early 1970s, the SUPARCO launched more than 200 rockets using the different payloads of an experimental satellite. With the launching of Rehbar-1, Pakistan became the third country in Asia, first country in South Asia, and the tenth in the world in carrying out such a launch. It was followed by the successful launch of the Rehbar-II in 1962. The last launch of the Rehbar Rocket Program took place on April 8, 1972. The Rehbar program formed the basis of the Hatf ballistic missiles.

Launch log[edit]

Version Date of Launch Launch Location Launch Pad Payload Mission Status
1 Nike Cajun Rehbar-I 7 June 1961 SSLC, Sonmiani Beach 1 Rehbar-1A Experimental Technology mission, 80 kg of Sodium Successful, developmental Flight.
2 Nike Cajune Rehbar-II 11 June 1962 SSLC, Sonmiani Beach 1 Rehbar-2B RS-1 Experimental Technology mission, 130 Kg Success, Developmental Flight with a small pay load of small weather satellite.
23 Nike Cajun Rehbar- XXIII 27 March 1970 SSLC, Sonmiani Beach 1 Rehbar-23 RS-1 Experimental Rocket Technology mission, 38 kg Successful, Developmental Flight.
24 Nike Cajun Rehbar- IIIV 28 March 1971 SSLC, Sonmiani Beach 1 Rehbar-24 Nike Cajune Experimental Rocket Technology mission, 141.5 kg Success, Developmental Flight.

See also[edit]

References[edit]

  1. ^ "Pakistan's first rocket soars 80 miles high". Dawn. 8 June 1962. 

External links[edit]