w.i.p. F-16 Pre-setting JDAM Accuracy (Steerpoint) in free server after april Patch

[Moonshine]

has to do with the missing "absolute" targeting. only "relative" targeting is modelled currently. ED is aware. lets hope this will be done rather quickly as it limits the viper to bomb drops while having direct line of sight with a TGP (lets face it, off the AG FCR you wont be accurate enough) so bad weather operations are not possible with JDAMs

[Clawhammer]

Hi,

i just wanted to create the same topic here. I have issues useing gps bombs like you too. I put the waypoint on the target, but ingame my bombs hit nothing because i have this drift explained above.

I have this issues since weeks, currently i fix this by using a tgp to bring my plane back on the target.

And yes, i have the correct altitude in the wp setting. i have no issues with these kind of bomb with the f18. I created the mission fresh on marinas.

i attached mission and track file

f16bombing.trk jdamtest.miz

Edited September 27, 2024 by Clawhammer

[Dondy]

See here:

Sadly this bug is still in the game and will hopefully be gone with the next patch which includes numerous updates to the F-16.

[Clawhammer]

@Dondy Ok, sry some people told me that this was already fixed (And the closed threat made me belive that). So i thought i had another different issue.

Edited September 27, 2024 by Clawhammer

[RandomPilot]

Hi all,

In this thread, it was mentioned that the offset we get with preplanned strikes using JDAM/JSOW was being worked on.

 

I flew a mission today on a multiplayer Caucasus server, and the offset is still there. My 4 JSOWs hit about 5 meters to the right of each target I had preplanned strikes for.

Do we have any updates regarding this issue?

 

[PawlaczGMD]

F-16 shouldn't be leaving early access. Major features are broken.

-Maverick in PRE mode is offset from the TGP for some reason, so it's impossible to use it effectively in this mode

-JDAM/JSOW will miss due to INS errors or something

-PUP attack or whatever it's called is also too imprecise to work

- EW/jamming doesn't really do anything, and F-16 is supposed to be a SEAD platform

- INS drift is huge even after just ingressing to target area, makes finding targets via JTAC coords frustrating. We have GPS on this plane, so shouldn't inaccuracy be up to ~5m at most? 

 

I'm probably the most frustrated and disappointed with this module out of all that I've bought. These issues show up in essentially every mission that isn't just CAP, and they have a major negative impact, it's not just rivet counting or wanting to LARP.

[BIGNEWY]

threads merged

[Bilico]

Hello, I'm back with a question that I don't know the answer to:

I need to enter known coordinates to hit a target with a JDAM, I can't use the TGP to refine the shot because I'm above a couple of layers of clouds.

F10 I take the coordinates (Pic001) and enter them as waypoint 1 (Pic002).

Once I get above the target I note with regret that there is a big gap between the target and where the TGP is pointing (Pic003).

Obviously this is a test created specifically without clouds to see where the TGP is actually pointing.

It does this trick on me in the Syria map (not in the Caucasus) and it does it both if I start from the ramp and if I start already in flight.

Maybe it's something basic, but I can't figure it out.

Thank you very much in advance for any answers.

bye

Bilico

[Hobel]

vor 1 Stunde schrieb Bilico:

Hello, I'm back with a question that I don't know the answer to:

I need to enter known coordinates to hit a target with a JDAM, I can't use the TGP to refine the shot because I'm above a couple of layers of clouds.

F10 I take the coordinates (Pic001) and enter them as waypoint 1 (Pic002).

Once I get above the target I note with regret that there is a big gap between the target and where the TGP is pointing (Pic003).

Obviously this is a test created specifically without clouds to see where the TGP is actually pointing.

It does this trick on me in the Syria map (not in the Caucasus) and it does it both if I start from the ramp and if I start already in flight.

Maybe it's something basic, but I can't figure it out.

Thank you very much in advance for any answers.

bye

Bilico

Could be the usual drift of the F16. Actually it shouldn't be a problem if you drop the JDAM anyway, the bomb would fly to the correct coordinates by itself.

Unfortunately this aspect is not yet implemented and attacking PP coordinates is hardly or not possible in the F16.

[Rongor]

considering the terrain elevation in the example above, this could simply be parallax error

[Hobel]

vor 41 Minuten schrieb Rongor:

considering the terrain elevation in the example above, this could simply be parallax error

The correct alt has been entered.

[Bilico]

1 hour ago, Hobel said:

... Actually it shouldn't be a problem if you drop the JDAM anyway, the bomb would fly to the correct coordinates by itself...

Unfortunately, JDAM hits exactly where TGP is aiming, missing the target.

16 minutes ago, Hobel said:

The correct alt has been entered.

yes 2032 feet

[Hobel]

vor 31 Minuten schrieb Bilico:

Unfortunately, JDAM hits exactly where TGP is aiming, missing the target

Exactly And that is the problem with PP.

The topic is discussed  here.

https://forum.dcs.world/topic/347411-f-16-pre-setting-jdam-accuracy-steerpoint-in-free-server-after-april-patch/

[SmallOldy]

When I input a steerpoint with format N12°34.567 E12°34.567, 1234ft it is inaccurate:

1. When I CZ the TGP, it moves near the target not at the target

2. GPS+INS guided bombs (GBU38&31) fall near the target not at the target in PP mode, but accurate in VIS mode.

About alignment: I use Hot-Spawn option and let the TGP and bombs power on before I use them

[Tholozor]

JDAMs on the F-16 currently don't have absolute targeting modeled (directly on STPT coordinates), and only use relative targeting based on sensor data at the moment. This has already been reported as WIP.

 

[SmallOldy]

52分钟前，Tholozor说：

JDAMs on the F-16 currently don't have absolute targeting modeled (directly on STPT coordinates), and only use relative targeting based on sensor data at the moment. This has already been reported as WIP.

 

What aircrafts have absolute targeting?

[Sinclair_76]

1 hour ago, SmallOldy said:

What aircrafts have absolute targeting?

The F-15E. 

 

Imagine that...

 

But all the other aircraft just have zero error introduced so the modes don't matter. 

Edited March 27 by Sinclair_76

[SmallOldy]

19分钟前，Sinclair_76说：

The F-15E. 

 

Imagine that...

 

But all the other aircraft just have zero error introduced so the modes don't matter. 

Only the F15E?

[JabbyJabara]

Hello, been having this problem for a while. JDAMs consistently off target - my other buddy in a squadron swears by them and that he can hit the hatch of a T72 accurately with these. Meanwhile my ones always end up either side of the tank. I do everything from chucks guide, i have FCR on and I use the laser to assist I am not using a PP point. I slew the TGP over and place it under the base of the tank as shown in the TGP screenshot.

 

I have tried multiple impact angles, multiple altitude tests and still not getting the same results. Theres obviously something I'm missing. Screenshots have come rom Sinai instant action

[speed-of-heat]

1m not sure why you think the laser helps, it's a Gps guided bomb, fire and forget  but, you seem to be in area track when you release the weapon rather than point track... Also I would normally press man until auto is displayed, that might be only for mav's I can't remember.

[Nealius]

ED (I can't remember who; either Bignewy or one of the beta testers) specifically instructed us to use the laser for improved JDAM accuracy. 

[rob10]

1 hour ago, JabbyJabara said:

Hello, been having this problem for a while. JDAMs consistently off target - my other buddy in a squadron swears by them and that he can hit the hatch of a T72 accurately with these. Meanwhile my ones always end up either side of the tank. I do everything from chucks guide, i have FCR on and I use the laser to assist I am not using a PP point. I slew the TGP over and place it under the base of the tank as shown in the TGP screenshot.

I have tried multiple impact angles, multiple altitude tests and still not getting the same results. Theres obviously something I'm missing. Screenshots have come rom Sinai instant action

If you a track you might get some useful answers.  Trying to diagnose from pictures is very difficult to do reliably.

[SpecterDC13]

3 hours ago, JabbyJabara said:

Hello, been having this problem for a while. JDAMs consistently off target - my other buddy in a squadron swears by them and that he can hit the hatch of a T72 accurately with these. Meanwhile my ones always end up either side of the tank. I do everything from chucks guide, i have FCR on and I use the laser to assist I am not using a PP point. I slew the TGP over and place it under the base of the tank as shown in the TGP screenshot.

I have tried multiple impact angles, multiple altitude tests and still not getting the same results. Theres obviously something I'm missing. Screenshots have come rom Sinai instant action

JDAMs are currently only using "Relative Targeting" at the moment. In other words, the JDAMs on the F16 do not have the GPS enabled just yet. This has been talked about to death in a few other forums if you just search "JDAM". You are doing everything correctly though by the looks of it. In relative targeting mode the accuracy for JDAMs is a 30m CEP. Your bomb is falling within that 30m CEP judging by the pictures. Make sure you lase at the base of the target though before dropping and lase as you press & hold the pickle button. The reason why you want to hold the laser down is to ensure the coords (including the correct altitude) are correct. You will notice this if you were to lase the top of the tank you will get a different elevation compared to lasing at the base of the tank. As far as impact angles those are going to be relative to distance. 



 

 

3 hours ago, speed-of-heat said:

1m not sure why you think the laser helps, it's a Gps guided bomb, fire and forget  but, you seem to be in area track when you release the weapon rather than point track... Also I would normally press man until auto is displayed, that might be only for mav's I can't remember.

See above as to why you lase. It is common practice to lase before dropping a JDAM in the F16. Being in Area or Point track doesn't matter as the SPI is controlled by the TGP either way. 
MAN/AUTO is specifically for AGM-65s for Handoffs. Not related to this at all.

[BIGNEWY]

9 hours ago, JabbyJabara said:

Hello, been having this problem for a while. JDAMs consistently off target - my other buddy in a squadron swears by them and that he can hit the hatch of a T72 accurately with these. Meanwhile my ones always end up either side of the tank. I do everything from chucks guide, i have FCR on and I use the laser to assist I am not using a PP point. I slew the TGP over and place it under the base of the tank as shown in the TGP screenshot.

 

I have tried multiple impact angles, multiple altitude tests and still not getting the same results. Theres obviously something I'm missing. Screenshots have come rom Sinai instant action

Hi, 

until JDAM are given self-GPS Guidance (in progress) you need to properly point designate the targets before launch, not use pre-assigned GPS coords from the mission. Otherwise, what's delivered to the weapon are INS coordinates supplied by the aircraft's MMC and that includes INS Drift.

thank you 

threads merged