Iranian Space program | News and Discussions

[samejjangir]

star link satellites get replaced like crazy if you want to know

Yes because the orbit degrades regularly. A satellite placed in 500km orbit becomes less useful when it degrades to 450x490 orbit. However, the satellites still stay in orbit without decaying unlike Iranian ones which decayed in less than 2 years

 

[Persian Gulf]

Yes because the orbit degrades regularly. A satellite placed in 500km orbit becomes less useful when it degrades to 450x490 orbit. However, the satellites still stay in orbit without decaying unlike Iranian ones which decayed in less than 2 years

in the last 8-9 years Iran put 4 satellites into LEO

3 cubesats (Noor-1, Noor-2 and Noor-3) + 1 small 50kg communication satellite (Soraya)

3 of those are still in orbit, only the first one decayed from orbit after 2 years (and was replaced with successful launch of Noor-2 into a higher orbit immediately), so I don't think there is enough evidence to make a strong judgment about the decay rate of Iranian satellites, especially since the IRGC program is still in its infancy (4 years old) and ISA has yet to build a reliable launcher

 

[Persian Gulf]

Iran's liquid fuel propulsion technology is almost entirely based off of North Korean and Soviet technology. The "Shahab" engines in Safir/Simorgh/Qased are modfied North Korean "Nodong" engines while the upper stage engines for Safir and Simorgh are modified versions of the steering engines from the old Soviet R27 SLBM.

Iran never has developed a liquid fuel rocket engine entirely from scratch. Solid fuel engines are much easier to develop hence why Iran has been able to develop them after some time.

And Nodong is based off Soviet SCUD. By contrast, the Raafe, Salman, Naafe and Zoljanah solid fuel engines are all purely domestic Iranian designs.

 

[Hack-Hook]

Exactly. Iran should have moved on by this point onto 100-500kg class of operational satellites placed in circular stable orbits rather than repeat what they achieved through their Safir program 15 years ago. They are still launching "bricks" into orbit even after 15 years.



Iran's liquid fuel propulsion technology is almost entirely based off of North Korean and Soviet technology. The "Shahab" engines in Safir/Simorgh/Qased are modfied North Korean "Nodong" engines while the upper stage engines for Safir and Simorgh are modified versions of the steering engines from the old Soviet R27 SLBM.

Iran never has developed a liquid fuel rocket engine entirely from scratch. Solid fuel engines are much easier to develop hence why Iran has been able to develop them after some time.

Since when solid fuel is easier?

 

[HAIDER]

Can you give a example of how Indian space program is a "derivative of Russian technology"?

India was rapidly improving in the Space Research Programme and on January 18, 1991, the Indian Space Research Organisation (ISRO) entered into an agreement with the Russian Space Agency Glavkosmos for technology transfer of “cryogenic engine”, which powered heavy rockets with cheaper fuel cost.
Author and broadcaster Brian Harvey wrote in his exhaustively researched book, ‘Russia in Space: The Failed Frontier’, that in the late 1980s, India was looking to develop a massive rocket to launch satellites into the 24-hour orbit. India first talked to Japan, but nothing came of it. Hearing of these overtures, Indians were approached first by General Dynamics Corporation, which offered an American engine. But the cost was prohibitive as was an offer shortly thereafter from Europe’s Arianespace.

“Just then a third approach came, this time from the Soviet Union, offering two engines and technology transfer for the more reasonable price of $200 million,” wrote Harvey.

The Russians were offering a secret engine, the RD-56 or KVD-1, built by the Isayev Design Bureau. The KVD-1 had unsurpassed thrust and capabilities and NASA had nothing that could match the Russian engine for years. In fact, the rocket engine was originally developed as part of the Soviet manned moon landing programme as far back as 1964.

On January 18, 1991, ISRO entered into an agreement with Glavkosmos for technology transfer of cryogenic engine.

 

[Immortals]

Footage released by Iranian state television showed a nighttime launch for the Simorgh rocket. An Associated Press analysis of the footage's details showed that it took place at the Imam Khomeini Spaceport in Iran's rural Semnan province.

State TV named the launched satellites Mahda, Kayhan-2 and Hatef-1. It described the Mahda as a research satellite, while the Kayhan and the Hatef were nanosatellites focused on global positioning and communication respectively.

There have been five failed launches in a row for the Simorgh program, another satellite-carrying rocket



A rare nighttime launch by Simorgh (semi decommissioned) rocket. I wonder if it was Simorgh or Sarir (redesigned Simorgh). Intresting move to use Simorgh rather than Zoljaneh

@jauk @Hack-Hook

ISA answers IRGC with 3 satellite launch of their own. One of the first successful [payload] launches in a long long time.

 

[Immortals]

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[muhammed45]

Footage released by Iranian state television showed a nighttime launch for the Simorgh rocket. An Associated Press analysis of the footage's details showed that it took place at the Imam Khomeini Spaceport in Iran's rural Semnan province.

State TV named the launched satellites Mahda, Kayhan-2 and Hatef-1. It described the Mahda as a research satellite, while the Kayhan and the Hatef were nanosatellites focused on global positioning and communication respectively.

There have been five failed launches in a row for the Simorgh program, another satellite-carrying rocket



A rare nighttime launch by Simorgh (semi decommissioned) rocket. I wonder if it was Simorgh or Sarir (redesigned Simorgh). Intresting move to use Simorgh rather than Zoljaneh

@jauk @Hack-Hook

ISA answers IRGC with 3 satellite launch of their own. One of the first successful [payload] launches in a long long time.

IRGC is going the French path of developing completely solid fuel SLVs.

ISA is dependent on governments, if a loser like Rouhani takes over then ISA will have to wait for budget shortage, flow of western spies and internal sabotage.

IRGC on the other hand, has sold its properties inside big cities to finance its space programs. They don't beg governors for fund. I see a light future of multiple successes for IRGC, God willing. They will be able to achieve the impossible victories. This is the same IRGC that started with a bunch of young people who had no idea on how to build fences, now launches satellite using it's own budget, it's own knowledge and it's own scientists.

 

[Mehdipersian]

Iran sent three new homegrown research satellites into an earth orbit on Sunday

The “Mahda” research satellite, along with two research cargos, was successfully sent to space by the homegrown “Simorgh” satellite carrier. The satellite carrier was launched from the Imam Khomeini National Space Center, situated 80 kilometers southeast of Semnan province. Manufactured by the...

defencepk.com

 

[Messerschmitt]

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[Hack-Hook]

It is common knowledge in space/missile sector that solid propellent rocket motors are easier and cheaper to develop. This is mostly because they lack moving parts like their liquid fuel counterparts.

View attachment 14630

developing solid fuel booster of same strength as a liquid fuel booster is more expensive , dangerous and complex you are comparing two engine with vastly different thrust output
about moving part the price of those two pomp is far far less than the price and hardship of casting those solid engines

 

[Hack-Hook]

Footage released by Iranian state television showed a nighttime launch for the Simorgh rocket. An Associated Press analysis of the footage's details showed that it took place at the Imam Khomeini Spaceport in Iran's rural Semnan province.

State TV named the launched satellites Mahda, Kayhan-2 and Hatef-1. It described the Mahda as a research satellite, while the Kayhan and the Hatef were nanosatellites focused on global positioning and communication respectively.

There have been five failed launches in a row for the Simorgh program, another satellite-carrying rocket



A rare nighttime launch by Simorgh (semi decommissioned) rocket. I wonder if it was Simorgh or Sarir (redesigned Simorgh). Intresting move to use Simorgh rather than Zoljaneh

@jauk @Hack-Hook

ISA answers IRGC with 3 satellite launch of their own. One of the first successful [payload] launches in a long long time.

the irgc launch is a lot different from ISA ,what IRGC developing is solid fuel launchers , ISA is focussed on Liquid fuel one . what ISA is try to produce is what you can call Iran future in space what irgc is building isnot a heavy work horse , they are building is something that you can send satellites on a short notice to the LEO in case of emergency
by the way simorgh launch today is not a complete stable orbit its a 1100km x 450km orbit so you can expect a decay of 1-2 years instead several year that you expect from a 1100km altitude satellite and the satellites were not working ones they were just providing telemetry . isa announced the next launch will be for working satellite
and the rocket looked like simorgh you can see it by its narrower upper stage

 

[Hack-Hook]

ISA is dependent on governments, if a loser like Rouhani takes over then ISA will have to wait for budget shortage, flow of western spies and internal sabotage.

again I'm waiting about proof flow of western spies part
ISA is dependent on defense ministry for its slv they don't build or design them , defense ministry do it for them , if the slv have problem you must blame defense ministry .
and IRGC don't sell its properties for funding its space endeavor .
here is not the place on discussing Iran economy and how semi governmental and front companies work in the system

 

[Flames In The Desert]

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[Flames In The Desert]

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