Iranian Space program | News and Discussions

[Hack-Hook]

do you think Soleimani name is more appropriate for a constellation of

1) spy imaging satellites
2) Iranian GPS to guide missiles
3) remote control

Honestly I don't emphasis too much about the name.
But the constatation no matter the porpuse is a significant one as it's the first serious project of iran in outer space.
It also point to the fact that we at last have a consistent and reliable launch vehicle
By the way by looking at the altitude of the sans for the constellation I say it's for remote control and later for I'm aging sat if you look at our current Imaging satellite (I mean noor-3) I say it's adequate for civilian porpuse if they manage to put a twice as heavy satellite in 500km altitude with Sarir then I say it very much benefit our military and reduce our reliance on drones for gathering intelligence it even make many mission which right now are impossible for us feasible.
Let be honest Russia or China never shared their intelligence data with us and never will do that. We must gather it ourselves.

 

[Hack-Hook]

Fiber-optic gyroscopes are low accuracy systems and are excessively bulky. The latest technology is MEMS based INS systems and guidance on a chipset. These chipsets can't be bough off the shelf as they are military grade and have much higher accuracy, reliability and tolerance.

Iranian missiles use GPS guidance and are endo-atmospheric which means if countries jam GPS Iranian missiles will fail. Also, the endo-atmospheric missiles are easily intercepted.

The point is our missiles with what we have can enter to the target area from a bath windows. That is good for us
GPS at the missile speed will not work on civilian channels they need military Chanel and if you claim USA opened those military channels for us then......
We use GPS for slow drones

 

[Hack-Hook]

Indian PSLV is not derived from Russia. It was developed & perfected indigenously over 3 decades by studying missiles, sounding rockets and other basic technologies. The cryogenic engines did receive Russian help in the form of engine sales which India studied & then modified to suit itself. But even without the help, India would have developed a more expensive version of heavy lift PSLV.

As for accuracy, if you miss a 5000km ICBM missile by 10km, it will likely fall in some forest or some farmland instead of a city which will be a complete waste of missile. But if you place a satellite in 550km orbit instead of 500km, it will still work fine.

Fiber-optic gyroscopes are low accuracy systems and are excessively bulky. The latest technology is MEMS based INS systems and guidance on a chipset. These chipsets can't be bough off the shelf as they are military grade and have much higher accuracy, reliability and tolerance.

Iranian missiles use GPS guidance and are endo-atmospheric which means if countries jam GPS Iranian missiles will fail. Also, the endo-atmospheric missiles are easily intercepted.

They did not stay in a stable orbit for even 2 months. The orbits kept on decaying continuously and fell off after 2 years. Stable orbits stay the same for a decade

Decaying for 19 month at the altitude of 425km
Is it what they teach you guys?

 

[muhammed45]

Indian PSLV is not derived from Russia. It was developed & perfected indigenously over 3 decades by studying missiles, sounding rockets and other basic technologies. The cryogenic engines did receive Russian help in the form of engine sales which India studied & then modified to suit itself. But even without the help, India would have developed a more expensive version of heavy lift PSLV.

As for accuracy, if you miss a 5000km ICBM missile by 10km, it will likely fall in some forest or some farmland instead of a city which will be a complete waste of missile. But if you place a satellite in 550km orbit instead of 500km, it will still work fine.

Fiber-optic gyroscopes are low accuracy systems and are excessively bulky. The latest technology is MEMS based INS systems and guidance on a chipset. These chipsets can't be bough off the shelf as they are military grade and have much higher accuracy, reliability and tolerance.

Iranian missiles use GPS guidance and are endo-atmospheric which means if countries jam GPS Iranian missiles will fail. Also, the endo-atmospheric missiles are easily intercepted.

They did not stay in a stable orbit for even 2 months. The orbits kept on decaying continuously and fell off after 2 years. Stable orbits stay the same for a decade

Why not build your own navigation system and show us you can do something without others' permission and without their assistance?

Is there something that I miss?

 

[samejjangir]

Why not build your own navigation system and show us you can do something without others' permission and without their assistance?

Is there something that I miss?

India already has built IRNSS which covers area from Turkey till Australia. To have larger constellation like GLONASS, GPS that covers entire world, India will need synchronisation bases in multiple locations across the globe which is difficult without alliance partners.

 

[samejjangir]

Decaying for 19 month at the altitude of 425km
Is it what they teach you guys?

Are you saying that a orbit functioned for 2 years and suddenly decayed? Decay is always gradual. All stable orbits don't decay and fall back in at least few decades. So, if a satellite has decayed in 2 years, that must have been a really unstable orbit from the beginning.

In fact, the ASAT missile tested by India created debris which decayed in 1-2 years. Iranian satellite that decayed in 2 years was in no more stable orbit that these debris.

 

[samejjangir]

The point is our missiles with what we have can enter to the target area from a bath windows. That is good for us
GPS at the missile speed will not work on civilian channels they need military Chanel and if you claim USA opened those military channels for us then......
We use GPS for slow drones

Iran has IIR/IR seekers which can home onto targets. But the guidance of ballistic missile in the mid-path is based on GNSS (Russian, Chinese, USA, EU). No, GPS/GNSS can be assessed regardless of speed as it is a 1 way signal. As long as appropriate equipments algorithms are developed to quickly catch and triangulate signals are made, speed won't matter. Russia, China may be providing the GNSS signals so that USA does not get to manipulate its GPS.

 

[Hack-Hook]

Are you saying that a orbit functioned for 2 years and suddenly decayed? Decay is always gradual. All stable orbits don't decay and fall back in at least few decades. So, if a satellite has decayed in 2 years, that must have been a really unstable orbit from the beginning.

In fact, the ASAT missile tested by India created debris which decayed in 1-2 years. Iranian satellite that decayed in 2 years was in no more stable orbit that these debris.

Show me a satellite in that orbit that remain in the same orbit for several decade without using some sort of propelant and then we are talking

 

[Hack-Hook]

Iran has IIR/IR seekers which can home onto targets. But the guidance of ballistic missile in the mid-path is based on GNSS (Russian, Chinese, USA, EU). No, GPS/GNSS can be assessed regardless of speed as it is a 1 way signal. As long as appropriate equipments algorithms are developed to quickly catch and triangulate signals are made, speed won't matter. Russia, China may be providing the GNSS signals so that USA does not get to manipulate its GPS.

Please study a little on Iranian missile types and how GPS work

 

[samejjangir]

Show me a satellite in that orbit that remain in the same orbit for several decade without using some sort of propelant and then we are talking

Not several decades but about a year in LEO with minimal degradation is easily possible and is the case with most surveillance satellites of major countries. If a satellite has decayed completely in 2 years, it means it would be shifting significantly from its orbit every week which is a very bad rate of decay.

 

[jauk]

Indian PSLV is not derived from Russia. It was developed & perfected indigenously over 3 decades by studying missiles, sounding rockets and other basic technologies. The cryogenic engines did receive Russian help in the form of engine sales which India studied & then modified to suit itself. But even without the help, India would have developed a more expensive version of heavy lift PSLV.

As for accuracy, if you miss a 5000km ICBM missile by 10km, it will likely fall in some forest or some farmland instead of a city which will be a complete waste of missile. But if you place a satellite in 550km orbit instead of 500km, it will still work fine.

Fiber-optic gyroscopes are low accuracy systems and are excessively bulky. The latest technology is MEMS based INS systems and guidance on a chipset. These chipsets can't be bough off the shelf as they are military grade and have much higher accuracy, reliability and tolerance.

Iranian missiles use GPS guidance and are endo-atmospheric which means if countries jam GPS Iranian missiles will fail. Also, the endo-atmospheric missiles are easily intercepted.

They did not stay in a stable orbit for even 2 months. The orbits kept on decaying continuously and fell off after 2 years. Stable orbits stay the same for a decade

India is unable to develop indigenous tech. Historically they leech it down and from outside. Zero innovation. India is an impoverished country and in chaos--the last country anyone wants to aspire to. Iranian tech is fresh and Iranian tech.

 

[Hack-Hook]

Not several decades but about a year in LEO with minimal degradation is easily possible and is the case with most surveillance satellites of major countries. If a satellite has decayed completely in 2 years, it means it would be shifting significantly from its orbit every week which is a very bad rate of decay.

Exactly show me 400km without propelent.

 

[samejjangir]

India is unable to develop indigenous tech. Historically they leech it down and from outside. Zero innovation. India is an impoverished country and in chaos--the last country anyone wants to aspire to. Iranian tech is fresh and Iranian tech.

Jealous much? There is no need to go out of the way to do something new. Just being able to keep up with technological development is enough. Even China is not doing anything new. This is simply because India started developing late and hence had time lag which it had to compensate by catching up.

Exactly show me 400km without propelent.

Why should one not have propellant? Who stops the use of propellant?

However, to answer your question, the starlink satellites don't use propellant to keep stable orbits. They do have propellant but they will remain in orbit for a decade even without maneuvering

 

[jauk]

Jealous much? There is no need to go out of the way to do something new. Just being able to keep up with technological development is enough. Even China is not doing anything new. This is simply because India started developing late and hence had time lag which it had to compensate by catching up.

Why should one not have propellant? Who stops the use of propellant?

However, to answer your question, the starlink satellites don't use propellant to keep stable orbits. They do have propellant but they will remain in orbit for a decade even without maneuvering

Jealous? Of India?

No.

 

[Hack-Hook]

Jealous much? There is no need to go out of the way to do something new. Just being able to keep up with technological development is enough. Even China is not doing anything new. This is simply because India started developing late and hence had time lag which it had to compensate by catching up.

Why should one not have propellant? Who stops the use of propellant?

However, to answer your question, the starlink satellites don't use propellant to keep stable orbits. They do have propellant but they will remain in orbit for a decade even without maneuvering

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