1. THREAD: Using footage provided so far, I will take a look at the Bavar-373 long-range air defence system and its subsystems.
First information we have got is a PressTV video.
First information we have got is a PressTV video.
https://twitter.com/PressTV/status/1163750739396702208?s=20
2. First observation of the missiles themselves - we see the Sayyad-4 missile, with serial no. SD4AM M4A. Sayyad-4 is widely attributed to be Bavar-373's missile and was seen years ago with the same fin assembly and tapered nose (3rd photo). It's about 7m long. 
3. It is launched vertically, as seen in these screenshots. But notably, it is a HOT launch, meaning the rocket motor is ignited inside the canister. This is unlike the S-300, which uses a cold launch system, ejecting the missiles with gas before they are fired (last pic).
4. The TEL is the Zoljanah, a LARGE 10x10 off-road truck. In testing it has 2 launch canisters, but when operational it will have 4.
5. Other vehicles include the Zafar, an 8x8 off-road truck used to carry the radars. Also included is a 6x6 truck (which may be off-road capable) with a large cabin (last screenshot). It seems to act as a mobile command post for the battery.
6. Curiously, Bavar has 3 radars instead of the usual 1 (Patriot) or 2 (S-300). 2 of the radars shown are here - an engagement radar and an "engagement and acquisition" radar. The battle management radar (last 2 pics) was shown before, called Meraj-4 (450 km range). All AESAs.
I'll talk more about this curious radar arrangement, and go into the whole Bavar-373 subject technically, in an upcoming blog post.
CORRECTION: The Meraj-4 battle-management radar is in the last (3rd) picture, NOT the last 2.
7. New picture of the erected Bavar-373 TEL, showing exposed missiles in testing.
8. Wide shot with full view of the TEL
The pictures and videos are just streaming in, at this point the leaks are REALLY jumping the gun for the big event tomorrow where the President is supposed to be present at the unveiling.
9. Full HD video of some of the test firings recently shown
10. Bavar-373 official unveiling is here. Specs:
Max. detection range: 320 km
Max. tracking range: 260 km
Max. engagement range: 200 km
Max. engagement altitude: 27 km
Simultaneously detected targets: 300
Simultaneously tracked targets: 60
Simultaneously engaged targets: 6
Max. detection range: 320 km
Max. tracking range: 260 km
Max. engagement range: 200 km
Max. engagement altitude: 27 km
Simultaneously detected targets: 300
Simultaneously tracked targets: 60
Simultaneously engaged targets: 6
11. More images
12. IRINN video
14. Fars News claim Bavar-373 has thrust vectoring (TVC) technology. I would take this with a pinch of salt for now, until other news agencies report it and/or officials confirm it.
15. DEFAPRESS (Defence Ministry Press Agency) has released more pictures:
16. And more:
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