Flappie Posted March 19, 2021 Share Posted March 19, 2021 (edited) I've been testing the SPA/SKU type II fix procedure with the Caucasus map. I'm getting odd results: Calculated angle is systematically wrong by ~15°. Calculated speed is often incorrect as well. I waited up to 5 minutes between two fixes to be sure the measurement would be effective, but it's not. Angle is 270°, speed is 9.71922 knots. Calculated angle is 254, calculated speed is 14 knots. Edited March 19, 2021 by Flappie solved Don't accept indie game testing requests from friends in Discord. Ever. Link to comment Share on other sites More sharing options...
Flappie Posted March 19, 2021 Author Share Posted March 19, 2021 Another try with a track attached. This time I got 265° (instead of 270) and 11 knots (good speed estimation). This is much more precise but I don't know what I did differently. How long do you guys wait between two fixes to get a correct course/speed calculation? AJS37_SKU.trk Don't accept indie game testing requests from friends in Discord. Ever. Link to comment Share on other sites More sharing options...
JG300_Papaye Posted March 19, 2021 Share Posted March 19, 2021 This depend of your fix. Do you perform a visual or a radar fix? [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
Flappie Posted March 19, 2021 Author Share Posted March 19, 2021 Radar fix. Don't accept indie game testing requests from friends in Discord. Ever. Link to comment Share on other sites More sharing options...
JG300_Papaye Posted March 19, 2021 Share Posted March 19, 2021 (edited) Radar fix precision depend of your scale, try with different scales. A pixel doesn't have the same wide in 15km scale and in 120km scale. On the second screen the ship is not in the center of the circle, maybe a bad fix. And try with the vertical fix. Edited March 19, 2021 by JG300_Papaye 1 [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
Flappie Posted March 19, 2021 Author Share Posted March 19, 2021 I agree, but I didn't think I would get such a huge error margin (15° difference). I'll do the maths with coordinates to better understand what happens. 1 Don't accept indie game testing requests from friends in Discord. Ever. Link to comment Share on other sites More sharing options...
Flappie Posted March 19, 2021 Author Share Posted March 19, 2021 Merci @JG300_Papaye! I did a radar fix with range 120 and saw my target fix coordinates were quite a bit up north the real position, meaning the measured course would obvisously be incorrect. Then I did the same SKU measurement only with visual fixes this time: this allowed me to see target measurement works just fine (271°-10 knots, whch grossly corresponds to 270-20km/h). False alarm. Don't accept indie game testing requests from friends in Discord. Ever. Link to comment Share on other sites More sharing options...
JG300_Papaye Posted March 20, 2021 Share Posted March 20, 2021 De rien [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
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