correct as-is HAD and TGP not aligned

[dutchili]

issue: TGP does not align with SPI of HAD

reproduction steps:

- try attached mission

- set autopilot to fligh to steerpoint 2 (hawk location)

- lock track radar with had when it starts launches

- observe that TGP slewes from steerpoint 2 to a location no beigin the location of the SPI (see image, desert only).

sead hawk.miz

[Moonshine]

To avoid confusion:

Initially Steerpoint 2 is your SPI location, so your TGP looks exactly there. By then using the HAD and locking on to the emitter, the SPI changes to where the HARM targeting System THINKS the emitter is and as the HARM targeting system is now dictating the location of the SPI, the TGP will slew automatically to that location as long as you hold the lock on that sam site on the HAD.

the accuracy of this location is indicated in the HAD as PGM. PGM 5 is the lowest accuracy, PGM 1 the best. in order for the number to drop, flying an arch around the assumed emitter location helps the triangulation to narrow it down - hence dont fly in a straight line to it. normally you will get PGM roughly down to PGM 2, in which case finding the SAM site within your TGP field of view should be possible.

 

in case i misunderstood your question, please post a trackfile

 

Edited December 20, 2022 by Moonshine

[Tholozor]

Exactly, the HTS isn't a spot-on targeting system, it uses angular signal reception to calculate approximate emitter positions. Flying directly towards an emitter reduces the pod's ability to make better calculations.

From the early access manual, page 285:
 

[dutchili]

Thanks both.

I wasn't expecting the TGP to be spot on at PGM2, but not as far off as it is.

I will see what happens with the search radars when i get to PGM1.

[dutchili]

@Tholozor: would you fly at 45 degree aspect and then make a right turn to fire your AGM-88? (thereby preventing getting to close)

[Moonshine]

Just fly along the yellow threat circle if you have one on the HSD.

And if there isnt one, when you get spiked you are too close to the not yet known location of the sam, so back out a bit, try again until you have found it.

alternatively, let it shoot and follow the smoke back to its launcher. But for that, one doesnt need a HTS pod

no need for a snap and then immediate shot but that very much depends on the mission environment and limitations 

Edited December 20, 2022 by Moonshine

[_SteelFalcon_]

if you're close enough, you dont even need to turn in to shoot the HARM. POS EOM will make the HARM turn to the target. and it's quite satisfying watching them go off, up and around  

PGM2 should be plenty accurate for the HARM to find the target.