Pandacat Posted January 28, 2019 Posted January 28, 2019 Currently the F-18 doesn't have a fully modeled AG radar, correct? You can't really do a radar guided CCRP bombing, right?
Cytt0rak Posted January 28, 2019 Posted January 28, 2019 what bomb has a radar receiver in the nose? How did you come to that conclusion? Before high accuracy ins/gps was a thing radar was used to compute ccip ccrp I believe this can be done in f/a-18.
Weasel Posted January 28, 2019 Posted January 28, 2019 Currently the F-18 doesn't have a fully modeled AG radar, correct? You can't really do a radar guided CCRP bombing, right? Yes that‘s correct. There is still no estimation when AG radar will be implemented. Please also see Wags mini-update thread to keep informed about the next steps of the DCS hornet:
WildBillKelsoe Posted January 28, 2019 Posted January 28, 2019 I think you come from Falcon? AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
toilet2000 Posted January 28, 2019 Posted January 28, 2019 what bomb has a radar receiver in the nose? To compute CCRP or CCIP deliveries, you need a range metric. In the A-10C, that ranging is done via triangulation, either: radar, barometric or delta (switchable via the Altitude Source toggle on the armament control panel). You know the height of the aircraft (via the altimeter setting), you know the pitch of the aircraft (via the INS), you can find the hypothenuse of the triangle, which is the slant range. If you have an SPI setup and you are releasing in CCRP, it's going to use the GPS/INS coordinate to infer slant range. The problem is, if the target is at a different altitude than the ground under your aircraft, then the slant range solution will be inaccurate (or you need to set QFE accordingly). One way to alleviate that problem is to compute range directly, via an AGR (just like the AJS-37 does) and this is what the F/A-18C should be doing (via the AGR surface radar mode). Another way to do so is via a system like the AV-8B N/A's ARBS. Another way is the laser-ranging way, which is what the Su-25A and T do. In fact, when no radar/ARBS/laser rangefinder are available, most system fall back to barometric or radar altimeter triangulation, which is what the F/A-18C should do.
Ramsay Posted January 28, 2019 Posted January 28, 2019 (edited) The problem is, if the target is at a different altitude than the ground under your aircraft, then the slant range solution will be inaccurate (or you need to set QFE accordingly). The F/A-18C Lot 20 and AV-8B moving maps include DTED (digital terrain elevation data). AFAIK QFE should be set for MSL so the aircraft's own barometric altitude reference is with respect to MSL, IIRC another option is to use the GPS reference ellipsoid. The AV-8B+ is flexible in which sensor/radar is used to calculate slant range, etc. I expect the F/A-18C is equally capable. Edited January 28, 2019 by Ramsay i9 9900K @4.8GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 11 Pro x64, Odyssey G93SC 5120X1440
QuiGon Posted January 29, 2019 Posted January 29, 2019 In the A-10C, that ranging is done via triangulation, either: radar, barometric or delta (switchable via the Altitude Source toggle on the armament control panel). You know the height of the aircraft (via the altimeter setting), you know the pitch of the aircraft (via the INS), you can find the hypothenuse of the triangle, which is the slant range. If you have an SPI setup and you are releasing in CCRP, it's going to use the GPS/INS coordinate to infer slant range. The A-10C uses DTED, like the Harrier and the Hornet, to calculate a correct firing solution, even if the height at the target location is diffrent than below the aircraft (e.g. when attacking a target on a mountain). Intel i7-12700K @ 8x5GHz+4x3.8GHz + 32 GB DDR5 RAM + Nvidia Geforce RTX 2080 (8 GB VRAM) + M.2 SSD + Windows 10 64Bit DCS Panavia Tornado (IDS) really needs to be a thing!
beppe_goodoldrebel Posted January 29, 2019 Posted January 29, 2019 I guess CCIP/AUTO mode use Altimeter radar to calculate Point of Impact. A/G radar is used for find SPI.
maxTRX Posted January 29, 2019 Posted January 29, 2019 ...A/G radar is used for find SPI. I used it for some weird stuff... like in this clip: https://youtu.be/vy_2RDMOlbU
arturojgt Posted January 29, 2019 Posted January 29, 2019 To compute CCRP or CCIP deliveries, you need a range metric. In the A-10C, that ranging is done via triangulation, either: radar, barometric or delta (switchable via the Altitude Source toggle on the armament control panel). You know the height of the aircraft (via the altimeter setting), you know the pitch of the aircraft (via the INS), you can find the hypothenuse of the triangle, which is the slant range. If you have an SPI setup and you are releasing in CCRP, it's going to use the GPS/INS coordinate to infer slant range. The problem is, if the target is at a different altitude than the ground under your aircraft, then the slant range solution will be inaccurate (or you need to set QFE accordingly). One way to alleviate that problem is to compute range directly, via an AGR (just like the AJS-37 does) and this is what the F/A-18C should be doing (via the AGR surface radar mode). Another way to do so is via a system like the AV-8B N/A's ARBS. Another way is the laser-ranging way, which is what the Su-25A and T do. In fact, when no radar/ARBS/laser rangefinder are available, most system fall back to barometric or radar altimeter triangulation, which is what the F/A-18C should do. Wow, how do you know all this? Sent from my Tornado IDS while on autopilot using Tapatalk Pro. Arturo "Chaco" Gonzalez Thomas
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