- Joined
- 11 February 2010
- Messages
- 1,545
- Reaction score
- 2,321
Yeah, would be interested on the claims of the GaN based radar. Is that specific to Su-57 or in general.
---
On the measure of effectiveness tho. One needs a good metrics. This metrics seems not really an explored realm in open-source discussion. Nonetheless there are this from Radar Technology Encyclopedia
Number 1,2,3,4,6 are mode dependent and might be bit difficult (but possible) to estimate. Below is my estimates (speculative) on Su-57 Radar.
In my AESA radar calculator improvement and taking account of those Technical-tactical characteristics mentioned from the above reference.. i'm trying now to also include throughput but that one is hard to implement. Another thing is to include prediction of detection range against ground/surface target with clutter background which kind of crude but appears to work. Big weaknesses is that the Clutter cancellation gain/Improvement factor are guessed. The correct way is to actually use a signal processor model to predict the radar's response on target but i need to figure it out first how to implement one in excel.
Num 5 is computation power dependent. Also hard to asess but there is rather crude method to do this. This is from "Airborne Early Warning System Concept"
Granted it is for AEW and for tracking target but i can see its applicable for fighter radar too. So let's say the radar have to track 200 targets at 1/2 Hz (correspond to about 2 seconds of tracking time), then every second it has to provide updates for 100 targets at once. We use the Kalman Filter, the computational load would be about 8000 * 100 = 800000 Multiplies per second. That for target tracking alone.
Cooling wise.. the Su-57 have enough and with room to spare with about 9-10 metric tonne of fuel. It may have potential of about 56-62 KW/sqm of total cooling capacity and may spare about 22 KW/sqm for Radar cooling. Such cooling capacity allows 21 Watt peak power TRM potential assuming 25% duty cycle or if Medium PRF operation is desired (duty cycle of about 10-15%) 36 Watt module.
---
On the measure of effectiveness tho. One needs a good metrics. This metrics seems not really an explored realm in open-source discussion. Nonetheless there are this from Radar Technology Encyclopedia
Number 1,2,3,4,6 are mode dependent and might be bit difficult (but possible) to estimate. Below is my estimates (speculative) on Su-57 Radar.
In my AESA radar calculator improvement and taking account of those Technical-tactical characteristics mentioned from the above reference.. i'm trying now to also include throughput but that one is hard to implement. Another thing is to include prediction of detection range against ground/surface target with clutter background which kind of crude but appears to work. Big weaknesses is that the Clutter cancellation gain/Improvement factor are guessed. The correct way is to actually use a signal processor model to predict the radar's response on target but i need to figure it out first how to implement one in excel.
Num 5 is computation power dependent. Also hard to asess but there is rather crude method to do this. This is from "Airborne Early Warning System Concept"
|
|
Granted it is for AEW and for tracking target but i can see its applicable for fighter radar too. So let's say the radar have to track 200 targets at 1/2 Hz (correspond to about 2 seconds of tracking time), then every second it has to provide updates for 100 targets at once. We use the Kalman Filter, the computational load would be about 8000 * 100 = 800000 Multiplies per second. That for target tracking alone.
Cooling wise.. the Su-57 have enough and with room to spare with about 9-10 metric tonne of fuel. It may have potential of about 56-62 KW/sqm of total cooling capacity and may spare about 22 KW/sqm for Radar cooling. Such cooling capacity allows 21 Watt peak power TRM potential assuming 25% duty cycle or if Medium PRF operation is desired (duty cycle of about 10-15%) 36 Watt module.
