Unsolved JASSM is missing targets
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@Atze-0 said in JASSM is missing targets:
The settings in the target list are just there to assign targets to different aircraft. They don’t produce precision steerpoints.
It’s not for me to say that’s a bug or by-design … but I will say, it’s a very confusing design – I can easily see how it would be a point of confusion, for folks.
Overlaid with other sources of confusion, like strong crosswinds and SPI delta from steerpoint / cursor-zero, etc.
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@Magnum1964 said in JASSM is missing targets:
with a free fall bomb but I don’t understand this effect with a GBU weapon. Why don’t we observe this effect with a LGB and with a GBU-31?
I’ve noticed JSOW range is pretty strongly affected by headwind and even crosswind.
LGB and JDAM are very heavy and falling mostly straight down, at terminal velocity… I think it would take hurricane force wind to blow them off course… if dropped from mid/high altitude.
But JASSM is a little jet-powered cruise missile that flies at M 0.9 … should be ok even in a hurricane. unless it flies directly through a tornado
Not sure where I’ve seen but I think real jet SMS/CNTL page does have some parameters to input estimated wind speed/direction. Presumably it just adds or subtracts to the computation of effective range / JIZ envelope.
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In my experience, on the fly targeting is best done by setting up the coordinates in stpt 81-99. I believe that the INS steerpoints are not meant for changing once in 3D
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@jayb
Worth to give this hint a try, yeah.Thanks for sharing it and with best regards.
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@foxster said in JASSM is missing targets:
while in flight using the coordinates from the TGP, it did not update to the new location and still hit the original pre-planned location.
I just did a quick check, and it seems ok to me – there may be some further nuance we need to drill down on?
What I did:
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TR#13, change loadout to JASSM … move waypoint 4 to near (but not on) airbase
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in flight: at distance ~30nm, activate TGP … note it’s aligned a few hundreds yards away from airbase, as expected
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slew TGP to target control tower … use “area-track”
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launch 2x JASSM
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observed: both hit the control tower
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expected: both hit the control tower
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@airtex2019 said in JASSM is missing targets:
It’s not for me to say that’s a bug or by-design … but I will say, it’s a very confusing design – I can easily see how it would be a point of confusion, for folks.
Overlaid with other sources of confusion, like strong crosswinds and SPI delta from steerpoint / cursor-zero, etc.
For more confusion: the manual says, you can make your normal steerpoints to precision steerpoint using the recon window (Designate as TGT STPT).
Best is to use Steerpoints 99 downwards for your GPS munitions.That normal steerpoints are not absolutely on target is a feature: before JDAMs were introduced, you had to align your target pod for lasing exactly like in real life.
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@airtex2019 Thanks for the feedback - based on your observation I had to assume I did something wrong (not surprising as I’m definitely still learning). I flew the op several times and kept getting the same results until I stumbled across what appears to have been my problem - altitude. I was having difficulty locking up the target with the TGP due to the sporadic clouds, so I was dropping below them at around 4-5k. At that low altitude I had to be doing over 360 knots in order to fire the JASSM. Because it’s self propelled, I didn’t think much of it being low, but it would miss completely, or at best overshoot the target by several hundred yards.
I re-ran the engagement at 20k which allowed a somewhat lower launch speed and used ground radar to obtain a lock if I couldn’t get the TGP to do it. It worked flawlessly each time hitting the designated targets perfectly.
I didn’t really find any technical specs on the JASSM in the manuals to find out about its parameters and limitations…is this a newer addition to BMS or am I just really missing something?
Something I must say I love about BMS is this attention to fine detail which gives different results by taking all parameters into account. Nice job as always Devs - this is the stuff that keeps it interesting!
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@foxster Ah, another layer of potential confusion!
Yes they do fly a slightly descending glide path, as noted above in the thread … just 1-2 degrees downward, I think. But that could be enough to limit range, if dropped from low alt. (review acmi)
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@Hubert3000 said in JASSM is missing targets:
@I-Hawk said in JASSM is missing targets:
@Hubert3000 said in JASSM is missing targets:
@I-Hawk said in JASSM is missing targets:
Hi,
Are you guys launching the weapon always when it’s in “RDY alignment” state?
Yes. As stated in OP other GPS guided weapons working and JASSM was working in previous bms versions, that rules a few things out. Clearly a bug IMO but if no one else is seeing it then it’s a weird one.
And I tried stock CPU settings as I have OCed CPU as I suspected same result so it’s not that if that is next question lol. Ram, GPU on stock.
Anyway not a huge issue if no one else is seeing it just thought I’d mention it.I’ll try to test myself later thanx.
Some more questions - When you say other weapons are working, does that include other similar weapons - i.e GPS guided with motor? or maybe only gliding weapons like JSOW or SDB?
Yes everything working right except JASSM.
Edit: Tested non F-16 as pilot.
Typhoon with Stormshadow
EF-18 with Taurus
Rafale with Apache and Scalp
All missing going off target. Didn’t notice as I never fly these planes or use these weapons. Any other GPS guided powered munitions in game?These missiles are also dropping altitude slowly as they fly to target like JASSM.
For Taurus and Stprm Shadow I figured that the guidance selected was different. It used TV and not IR and was different from JASSM. The missiles were flying to the target area, but came down in the middle of nowhere. When I changed the guidance of the weapons they were working properly.
The TV guidance probably required datalink support (man in the loop).
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Balkans, same problem with AI launched missiles. Sead escort to b-2 loaded with jassms, all missed targets.