Caput_58 Posted December 1, 2023 Posted December 1, 2023 I'm either misunderstanding or the manual is incorrect about radar elevation. I had thought that E mode was elevation in degrees, whereas D mode outputted a height difference in thousands of feet at cursor location. The behavior I'm seeing for that is reversed though. In E mode, the number changes as you move the alidade closer/further, and can get very very big when you're at distant ranges (+/- 99). In D mode, the value doesn't change with distance and seems to correspond to the hard stops for elevation in degrees. The stop seems to be at +/- 48, though I gather from the manual, it should be +28 or -32. Actually, those stops are what we should see for D (+/- 48,000ft), so I'm really not sure what's going on.
Solution fausete Posted December 2, 2023 Solution Posted December 2, 2023 Hi @Caput_58, In both modes the delta height is displayed in thousands of feet. In E (constant elevation angle) mode the number is changing as the strobe is moved along the vertical axis because the antenna elevation angle is kept constant. In D (constant height difference) mode the antenna elevation is changing as the strobe moves. And as the delta elevation is displayed, it is still a constant value. 2 2
Caput_58 Posted December 2, 2023 Author Posted December 2, 2023 That makes sense, thanks so much for the explanation. 1
CrazyGman Posted December 3, 2023 Posted December 3, 2023 On 12/2/2023 at 1:13 PM, fausete said: No problem! The one thing that is odd with this system and I think adds to the confusion is because it seems that when you have the alidade in the bottom range of the scope in E constant elevation angle and you try to increase the elevation angle it doesn't show any change of angle untill you move the alidade range out futher, so it works counterintuitive compared to other aircraft where you change to anntena elevation and the value automatically changes. So people think D mode and E mode are reversed.
fausete Posted December 4, 2023 Posted December 4, 2023 Hi, Just to clarify, the E mode works differently depending on the model of the aircraft. The manuals that are publicly available, such as those of the ED, correspond to a different logic than the models we are simulating. 3
gnomechild Posted December 9, 2023 Posted December 9, 2023 On 12/4/2023 at 4:30 AM, fausete said: Hi, Just to clarify, the E mode works differently depending on the model of the aircraft. The manuals that are publicly available, such as those of the ED, correspond to a different logic than the models we are simulating. Ah! This explains a lot. I am very guilty of just relying on the F1ED manual for info haha. Perhaps if we had a write up of the Cyrano IVM it might help with some of the confusion https://forum.dcs.world/topic/337807-radar-white-paper-roadmap/
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