Indian AEW&C System, AVM PP Katarki, CABS,DRDO
Many points Zynda seems to have already captured in his post.. Also refer to his post for completeness .Role specified by IAF
– detect, track and act as a command & control function complementing the bigger IL-76based system.
-Primary radar with added elevation scan to overcome banking problems (7-10deg)
-IFFmk12 with S-mode capability (mode4, modes, level2 interrogator developed inhoise except for the high-power L-Band amplifier which is imported)
-CSM & CSM recording for offline analysis
-C-band highcapacity datalink for LOS A-G & G-A; Ku-Band Satcom for non-LOS
-7 V/UHF sets with data & voice – 5for operators & 2 for flight crew
-5OWS (additional flight seats for additional set of crew), IFR
There is a comparison slide of how the systems on CABS AEW&C against what is there and what is missing on similar systems around the world.. As you can see the indigenous AEW&C system has all of it, where as other systems around the world is missing some systems in their architecture. (refer to the picture poster of the slides). (This to me signifies two things – while the others have made some design compromises, the IAF wanted all the systems on it – a clearcut case of IAF brochiritis, and also why there is no space/weight left to accommodate antennas for fore/aft coverage.. thankfully IAF made that compromise & did not ask for 360deg coverage)
Certification responsibility lies with Embraer (platform along with dorsal unit).. Close co-operation between Embraer & CABS team for all the real estate management, CG management etc stressed. IAF, CEMILAC etc are always in loop at every stage while affecting any changes/modifications. First AAAU (mass & CG equivalent dummy) handed over to Embraer, rollout in 21 Feb2011. The electronic AAAU will be ready by the time Embaraer finishes flight tests of the airframe.
-Aerodynamic & Inertial loads at different points in the operating envelop estimated from windtunnel and passed on to Embarer.
-8.24m long dorsal unit tested for lighting protection (high voltage & high current modes)
-T/R module technology is prone to denial. It not only has to be designed & mass produced but has to be flight qualified, airworthiness certified, air cooled etc – we have been able to do it all in-house (with help of Astra Microwave, Hyd)AAAU unit already tested for transmission & reception from rooftop against opportune & assigned targets
– which means they tested it against normal Bangalore flight traffic, as well as some specific experiments where they flew certain a/c with a view to test the system performance. Tested in target crossover mode, multiple targets, highly manoeuvring targets already
-All individual systems tested in standalone mode on AVRO platform. IFF tests on AVRO proved the Range, azimuth accuracy, scan time & coverage.
-ESM & SPS under integration.
-IAF is still evolving its concepts of battle management, command & control (I think they will evolve as the experience with operating the Phalcon build-up).. the IAF team embedded at CABS acts as a continuous conduit for two way transfer of information... the algorithms for intercept based on collision, pursuit and offset are being developed and under validation.. the IAF team along with fighter controllers evaluate and clear these.. the software is being developed in 3-4builds with added functionality along the way.. Look into the picture poster that I wil post. One of the simulation scenarios where a AEW&C detects a F16 and about to vector a Mig29 on to that.
In the concluding remarks after the talk, Dr.K.Thamilzmani, CEMILAC remarks that the program is on schedule.
For completeness & records, adding up a post from AeroIndia2007
1. Each time 120deg coverage. A/c turns around for 120deg from other side.1280 modules switched over from one side to the other as required with a switching mech
2. 360deg coverage possible, but restricted only by payload constraints – IAF asked for a lot of systems. Including all that meant only this much could be put into arrays. If 360deg coverage required – we can put some antennas at front and back.
3. 65*8*160 watt peak power, 0.07*peakpower = AvgPower (7% duty cycle)
4. Data transfer to 40a/c @ 64kbps VHF/UHF 300km range. LOS. Only info (target coords, speeds etc in a pre-set format), no pictures.
5. Satcom to ground station – no range limitation. No LOS limitations.
6. Array – S band, IFF – L band (250w amplifier) 500km range for IFF at sides(250km range front & back)
7. 5hrs endurance w/o IFR
8. Cooling by natural convection
9. AA, A2G, A2C modes exist. Inter-leaving doesn’t exist. If end user asks – can be done. Needs a simple switching mechanism.
10. 5 operator consoles.. toilets are there
CABS AEW&C project has 10 senior IAF officers working with the CABS/LRDE group to reduce the communicatio/expectation gap between the development agency & enduser.