IVEWS isn’t an RWR, it’s a EW suite. IVEWS is only for domestic F-16s.
Viper Shield itself is inapplicable to the topic, as it’s solely used on export Viper packages.
Even then its inbuilt RWR lacks a lot of USAF-specific abilities, such as GPS algorithms that allow the RWR to estimate and store GPS positioning of RWR contacts or the ability to distinguish a signal’s estimated elevation.
I’m sure Elbit may have some home-grown system that can process signals to a good degree, but I don’t know if it’s sophisticated enough to get exact incidence angles out of them.
It also has an open threat library, given that it’s designed for use in various different countries.
Both ALR-69A and ALQ-254 have a vertical lobe precision of +/-30dg. Neither have deadzones. Both do indeed give a full +/-180dg vertical but without guaranteed precision.
There is no “ALR-39”, there’s an APR-39 which is in your linked site, but that’s expressly used for technical aircraft like 130Hs and UH-60s and quite a few combat-oriented helicopters.
The word “interdependencies” seems to have slipped past ya, this is an Army site for their integration of IVEWS into the by the Army. Yknow, AH-64s and UH-60/MH-60s?
APR-39E, as I’ve said before, is expressly used for helicopters and niche utility aircraft. Given that APR-39E is needed for the FVL suite, and the next-gen ASE suite as a whole is based on IVEWS, they’re deducing that APR-39E is capable of being a sole RWR fixture of IVEWS despite it not being a dedicated ECM system in itself.
I understand that much, the full digital receivers that replaced the superheterodyne dude up on the vert stab are both known to me, but to my knowledge the IVEWS rear 120dg output is done by those antennae on top of the vert stab, as the previous image pointed out.
Both of those are expressly for the right and left receiver coverage zones, but I have no clue what the difference in size may entail. Maybe it is true that a transmitter was added alongside the receivers?
Even the URL you’ve given is titled ‘-ase’, which is the Army’s provisional name for “aircraft survival equipment”. If you’ve read their FY24 release which details their ASE procurements then you’d see that APR-39E is explicitly tied to the FVL’s ECM program.
The FVL’s ECM suite is, as I’ve said, directly based on IVEWS.
Breaking news, Snorethrop Grumblin’s PR team doesn’t give two shits about what they portray.
Because god knows some junior enlisted guy packed full of nicotine and caffeine thought up some fancy sounding low effort bullet point to make their project manager page look like it was worth its time.
Once again, no F-16 uses APR-39… Unless the Army somehow got their hands on an F-16 and shoved their Army/Navy-exclusive avionics in there.
And again, what’s stopping the APR-39 from appearing on the F-16? Sounds logical that the company that manufactures the APR-39 would try to shove the APR-39 into its EW suit?
From what I remember the Marines contracted it for their 130Hs before they upgraded to Js, given I’ve never looked for an update on that I just stick with 130Hs having it.
