Scenario Files Not Working as Intended

[AdityaIshaanT]

Scenario Files Not Working as Intended

[ProfHoekstra]

Hi Aditya, From first glance, maybe it is caused by the extremely short legs. Meaning the aircraft is constantly in turning/wp switch mode. Speeds as FROM speeds, which will be active on the leg after the waypoint after the turn. Best regards, Jacco Hoekstra From: AdityaIshaanT ***@***.***> Sent: vrijdag 23 juni 2023 09:32 To: TUDelft-CNS-ATM/bluesky ***@***.***> Cc: Subscribed ***@***.***> Subject: [TUDelft-CNS-ATM/bluesky] Scenario Files Not Working as Intended (Issue #469) Hello! I am trying to automate the creation of scenario files from ADS-B data to simulate real flights and analyze their fuel flow and emissions. The scenario file below has been created through a Python script. I have been trying to make it work but it keeps giving me trouble. Upon running it, the speed of the aircraft goes on decreasing until a certain value and then stays constant while in cruise. It does not follow the speed constraints defined at the waypoints. For reference, the altitude constraints are working as intended. Also, I am using BADA Performance Data with the required files added to the bluesky -> resources -> performance -> BADA folder. Appreciate your guidance and help in this matter. Looking forward to hearing from you and thanking you in anticipation. Best Regards, Aditya Ishaan. T 00:00:00.00> TRAIL ON 00:00:00.00> CRELOG AAR751_LOG 1 00:00:00.00> AAR751_LOG ADD traf.lat, traf.lon, traf.alt, traf.perf.fuelflow 00:00:00.00> AAR751_LOG ON 00:00:00.00> CRE AAR751, A359, 13.312728870660068, 113.7190088443458, 198.6712646484375, 40000.0, 459.0087890625 00:00:00.00> ADDWPT AAR751, 13.308837823569776, 113.71768282726408, 40000.0, 459.0087890625 00:00:00.00> ADDWPT AAR751, 12.881981693208218, 113.56933588162065, 40000.0, 458.7890625 00:00:00.00> ADDWPT AAR751, 12.564651388674974, 113.45008051022889, 40000.0, 462.5244140625 00:00:00.00> ADDWPT AAR751, 12.215515114367008, 113.17196544259788, 40000.0, 466.9189453125 00:00:00.00> ADDWPT AAR751, 11.901219226419926, 112.7197746746242, 40000.0, 467.578125 00:00:00.00> ADDWPT AAR751, 11.643401943147182, 112.35026383772492, 40000.0, 471.7529296875 00:00:00.00> ADDWPT AAR751, 11.335967984050512, 111.9122314453125, 40000.0, 478.125 00:00:00.00> ADDWPT AAR751, 10.983489844948052, 111.412353515625, 40000.0, 480.76171875 00:00:00.00> ADDWPT AAR751, 10.698402374982834, 111.0097623243928, 40000.0, 481.4208984375 00:00:00.00> ADDWPT AAR751, 10.405728612095118, 110.59794450178742, 40000.0, 474.169921875 00:00:00.00> ADDWPT AAR751, 10.131070408970118, 110.27346896007656, 40000.0, 468.896484375 00:00:00.00> ADDWPT AAR751, 9.672592040151358, 109.94977528229356, 40000.0, 468.2373046875 00:00:00.00> ADDWPT AAR751, 9.30207822471857, 109.68931552022696, 40000.0, 471.09375 00:00:00.00> ADDWPT AAR751, 8.892734237015247, 109.40242359414697, 40000.0, 474.8291015625 00:00:00.00> ADDWPT AAR751, 8.45486395061016, 109.09783713519572, 40000.0, 472.1923828125 00:00:00.00> ADDWPT AAR751, 8.09417724609375, 108.84788375347853, 40000.0, 475.048828125 00:00:00.00> ADDWPT AAR751, 7.650512550026178, 108.54110458865762, 40000.0, 475.927734375 00:00:00.00> ADDWPT AAR751, 7.30558231472969, 108.30312794074416, 40000.0, 473.0712890625 00:00:00.00> ADDWPT AAR751, 6.993356421589851, 108.0874265357852, 40000.0, 472.412109375 00:00:00.00> ADDWPT AAR751, 6.601805537939072, 107.81461503356697, 40000.0, 476.1474609375 00:00:00.00> ADDWPT AAR751, 6.298782303929329, 107.6040079817176, 40000.0, 478.3447265625 00:00:00.00> ADDWPT AAR751, 6.040191538631916, 107.4245024845004, 40000.0, 478.3447265625 00:00:00.00> ADDWPT AAR751, 5.6920817121863365, 107.18318531289697, 40000.0, 479.2236328125 00:00:00.00> ADDWPT AAR751, 5.406949315220118, 106.98576299473643, 40000.0, 482.080078125 00:00:00.00> ADDWPT AAR751, 5.098434425890446, 106.77244540303946, 40000.0, 489.990234375 00:00:00.00> ADDWPT AAR751, 4.786175172775984, 106.55682262033224, 40000.0, 491.5283203125 00:00:00.00> ADDWPT AAR751, 4.451138768345118, 106.32563615217803, 40000.0, 489.990234375 00:00:00.00> ADDWPT AAR751, 4.162994250655174, 106.0588926449418, 40000.0, 496.142578125 00:00:00.00> ADDWPT AAR751, 3.975402731448412, 105.8281797543168, 40000.0, 491.30859375 00:00:00.00> ADDWPT AAR751, 3.7885893881320953, 105.59835132211448, 40000.0, 491.30859375 00:00:00.00> ADDWPT AAR751, 3.576887659728527, 105.33729275688528, 40000.0, 490.6494140625 00:00:00.00> ADDWPT AAR751, 3.424708340317011, 105.14962546527386, 39625.0, 487.79296875 00:00:00.00> ADDWPT AAR751, 3.421729076653719, 105.14593189582229, 39600.0, 487.79296875 00:00:00.00> ADDWPT AAR751, 3.2141525857150555, 104.89012090489268, 35125.0, 477.0263671875 00:00:00.00> ADDWPT AAR751, 3.024731632322073, 104.65869756415486, 30825.0, 454.833984375 00:00:00.00> ADDWPT AAR751, 2.825317271053791, 104.44599721580744, 26700.0, 431.54296875 00:00:00.00> ADDWPT AAR751, 2.6503141969442368, 104.25876410678028, 22950.0, 420.7763671875 00:00:00.00> ADDWPT AAR751, 2.4682461842894554, 104.10483514890076, 20675.0, 358.8134765625 00:00:00.00> ADDWPT AAR751, 2.241302467882633, 104.10220893099904, 17700.0, 336.181640625 00:00:00.00> ADDWPT AAR751, 2.0522001944482327, 104.0350341796875, 15800.0, 284.326171875 00:00:00.00> ADDWPT AAR751, 1.8784788809716704, 104.02698051184416, 13100.0, 279.931640625 00:00:00.00> ADDWPT AAR751, 1.7059020325541496, 104.07167064025998, 10475.0, 273.1201171875 00:00:00.00> ADDWPT AAR751, 1.5314754657447338, 104.10701343789697, 7975.0, 264.7705078125 00:00:00.00> ADDWPT AAR751, 1.34191470220685, 104.11113331094384, 6975.0, 238.623046875 00:00:00.00> ADDWPT AAR751, 1.1991390399634838, 104.05208179727197, 4550.0, 231.15234375 00:00:00.00> ADDWPT AAR751, 1.1523284576833248, 103.93448118120432, 2975.0, 185.2294921875 00:00:00.00> ADDWPT AAR751, 1.2774810008704662, 103.94728319719434, 1575.0, 161.279296875 00:00:00.00> ADDWPT AAR751, 1.3528747111558914, 103.97907827049494, 100.0, 138.427734375 00:00:00.00> AAR751 VNAV ON 00:00:00.00> AAR751 AT AAR751048 DO AAR751_LOG OFF 00:00:00.00> AAR751 AT AAR751048 DO DEL AAR751 — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https:/github.com/TUDelft-CNS-ATM/bluesky/issues/469__;!!PAKc-5URQlI!5865urbkfrTmjVR4O9CY0s2tFeDVxytCJFU2VhYPnXFGNvC-FVN46PeItoQFDUv6CK_EkFko7Bzi_TkONOPQWNL64pCdkQ$>, or 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[AdityaIshaanT]

Dear Prof. Hoekstra,

Thank you for your response. My apologies for the delay in getting back to you. Even upon significantly reducing the number of waypoints from 48 to about 11, the problem still persists. There is no change of speed during cruise when the altitude is constant.

Interestingly enough, the speed changes at the later waypoints at lower altitudes to reflect the constraint set at those waypoints.

I was, therefore, wondering if there is some other issue at play here. Thank you once again for your guidance and time!

Best regards,
Aditya Ishaan. T

[jooste]

Hi @AdityaIshaanT!

The behaviour you are seeing is intentional! What you are seeing is performance limiting. The speed you are setting, 459 kts @ FL400 is equal to Mach 1.37, which is well beyond the capabilities of the A359 ;)

[AdityaIshaanT]

Now I finally see what the problem is. Really appreciate your help and guidance @ProfHoekstra and @jooste. Thank you so much!