reported earlier TTA/TTG not considering Vc (or if not that, something else weird happening)

[MARLAN_]

While investigating TWS Rankings (which appear to be correct as is, as far as the ranking logic goes) it noticed that probably the culprit causing TWS Rankings to be incorrect is that Vc is not considered, or not correctly considered as part of the TTG calculation which is then used for TWS rankings, and if not that, something weird is definitely going on.

A Mach 2.1 contact and a Mach 0.6 contact should not have the same expected time to active. The MC shows the same time to active when the actual splash is 29 seconds apart. I am guessing this is part of why TWS rankings are incorrect.

(Approx. Same Location)
Trail (Mach 2.1) Contact -- 46 ACT Pre-launch/passing 04:30:22
Lead (Mach 0.6) Contact -- 46 ACT Pre-launch/passing 04:30:22

(Approx. Same Location)
Trail (Mach 2.1) Contact -- 39 ACT Launch 04:30:23
Lead (Mach 0.6) Contact -- 39 ACT Launch 04:30:24

Trail (Mach 1.8) Contact -- 11 TTG 04:31:05
    +3s from MC prediction, 8% error
Lead (Mach 0.6) Contact -- 11 TTG 04:31:22
    +19s from MC prediction, 48% error

Trail (Mach 1.8) Contact -- Actual Splash 04:31:17
    -> +1s from MC prediction, 9% error, 8% error from launch.
Lead (Mach 0.6) Contact -- Actual Splash 04:31:46
    -> +13s from MC prediction, 118% error from TTG, 64% error from launch.

TTGNoCalcVc.trk

Edited June 27, 2022 by MARLAN_

[BIGNEWY]

Rankings issues are being investigated internally at the moment. 

thanks