Closed LuigiP57 closed 2 months ago
PygmalionOfCyprus
commented
2 months ago Sorry, maybe I'm just missing it, but what is the source for the presumed VHF/S-band array? I can't find mention of VHF on the SDF or in the other sources you linked.
LuigiP57
commented
2 months ago @PygmalionOfCyprus
I have to admit, I actually learned about the KJ-700 some time before I proposed the ticket (almost immediately after it was revealed). I did see references to "Dual band Radar" from some Chinese OSINT accounts that could be considered reliable, pointing to some kind of "advanced-low-frequency radar" technology (I have mentioned this source in other tickets before). But, unfortunately, they were "blocked" at the same time I proposed the ticket. Just leave some general paraphrases on X. https://twitter.com/jpg2t785/status/1804079061175861311 https://twitter.com/_ConflictsWatch/status/1803783937413525824
In fact, the combination of VHF & S band is not difficult to understand, it can meet the needs of anti-stealth, but also to meet the needs of long-range accurate detection and fire control guidance.
As noted by Aviationist in their article on KJ-700: Modern AWACS have great versatility. https://theaviationist.com/2024/06/22/kj-700/
In fact, they are also expected to classify enemy radar emissions with basic EW/ELINT (Electronic Warfare/Electronic Intelligence) capabilities, track LO (Low Observable) fast maneuvering cruise missiles, incorporate inputs from satellites, detect stealth aircraft, coordinate with ground-based AD (Air Defenses) and trade information with friendly assets over data links.
PygmalionOfCyprus
commented
2 months ago Sure, but "dual band radar" much more frequently refers to S/X-band, right? That's also a pairing with more precedent for AEW aircraft.
I don't doubt that it would be useful for them to have a VHF radar on their AWACS for improved anti-stealth capability, but I don't think we can make that assumption just based on vague references to a "dual band radar" alone. It's far more likely IMO that it's just a conventional radar array, maybe L/S or X/S, etc. Of course we can change this in the future if we discover that I'm wrong, but I need stronger evidence.
LuigiP57
commented
2 months ago Sure, but "dual band radar" much more frequently refers to S/X-band, right? That's also a pairing with more precedent for AEW aircraft.
I don't doubt that it would be useful for them to have a VHF radar on their AWACS for improved anti-stealth capability, but I don't think we can make that assumption just based on vague references to a "dual band radar" alone. It's far more likely IMO that it's just a conventional radar array, maybe L/S or X/S, etc. Of course we can change this in the future if we discover that I'm wrong, but I need stronger evidence.
Well then, considering the needs of anti-LO-target, it would be better to give it L/S(NATO D/E band radar). But do notice that don’t put two band in one sensor in order to keep its best detection performance.
PygmalionOfCyprus
commented
2 months ago it would be better to give it L/S(NATO D/E band radar)
Yep, this is what I did when I added the KJ-700 entry. 🙂
But do notice that don’t put two band in one sensor in order to keep its best detection performance.
Mhm. I built it as a sensor group w/ two distinct sub-entries so that should mitigate the problem.
DB Selector
DB3K
Baseline
sensor 7122
Hypothetical
No
Name
KJ-700 AESA [VHF Mod]
Sensor Generation
Early 2020s
Range (nm)
0.2-350
Horizontal Arc (deg)
No response
Vertical Arc (deg)
No response
Sensor Capabilities
Air Search, Surface Search, Land Search - Fixed Facility, Land Search - Mobile Unit, Range Information, Altitude Information, Speed Information, Heading Information
Sensor Codes
Identification Friend or Foe (IFF) [Side Info], Classification [Class Info] / Brilliant Weapon [Automatic Target Acquisition], Non-Cooperative Target Recognition (NCTR) - Jet Engine Modulation [Class Info], Continuous Tracking Capability, Track While Scan (TWS), Moving Target Indicator (MTI), Pulse Doppler Radar (Full LDSD Capability), Active Electronically Scanned Array (AESA), Can Classify Ground Targets (SAR), Frequency Agile
Search/Track Frequencies
A Band (30-250 MHz) [Old P Band (HF)] 100-300 cm
Lower Frequency (Hz)
150MHz
Upper Frequency (Hz)
200MHz
Scan Interval (s)
6
Target Altitude (ft)
No response
Horizontal Beamwidth (deg)
1
Vertical Beamwidth (deg)
1
System Noise Level (dB)
2
Processing Gain/Loss (dB)
12
Peak Power (W)
1200000
Pulse Width (μs)
No response
Blind Time (μs)
No response
PRF (Hz)
No response
Source Level (dB)
No response
Pulse Length (ms)
No response
TASS/VDS Length (m)
No response
TASS/VDS Depth (m)
No response
Convergence Zones
No response
Comments
According to OSINT analysis, KJ-700's radar uses a Digital array - Dual band (presumed VHF & S), however, the presence of different-bands-in-one-sensor in game will cause the detection range to be severely degraded (I mentioned in earlier tickets), so I intend to submit only one mod of this sensor, and for S-band mode, you can just copy the ticket's data and modify the band to E
Sources
https://chinese-military-aviation.blogspot.com/p/surveillance-aircraft-ii.html https://www.sinodefenceforum.com/t/pla-aew-c-sigint-ew-and-mpa-thread.951/page-299 (page 299-304) We can see what the digital VHF radar array looks like from the official model of the WZ-9 UAV https://twitter.com/RupprechtDeino/status/1604399316776456193