Predicted sonic boom arrival times at your location for Vandenberg SFB launches — plus a report form to log what you actually heard.
Tell the model what you heard (or didn't). Reports feed the Bayesian verdict engine. Your current location (—) is attached automatically.
Timestamp the moment you hear it, then finish the form at leisure — the stamp is the wall-clock datum the model calibrates against. Note: filing requires the page to be served over http(s) (localhost or pages.dev), not opened as a file.
Run any liftoff time through the model — useful for webcast T+0 that differs from the published NET, or launch scrubs/rescheduling.
Surface sound speed 343 m/s. Ascent boom sourced at SLC-4E (v0 approximation of the sweeping boom carpet). Descent boom sourced at LZ-4, conditioned on an RTLS recovery, which is unconfirmed for most missions. Each window spans profile slack (ascent −60/+180 s, descent −120/+240 s around Mach crossover) plus propagation delay; the peak is crossover + propagation — the most likely arrival. Crossover times come from the live prediction engine when available (currently fitted at T+60 s ascent). Atmospheric refraction and winds can shift arrival by tens of seconds — treat windows as expectations, not appointments. Calibration anchor: Ventura, 133 km from LZ-4, observed boom ≈ T+8 min.