User talk:HLFan

Welcome to Wikidata, HLFan!

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Best regards! M2k~dewiki (talk) 11:21, 23 January 2023 (UTC)

Changes to Starship Integrated Flight Test 2 (Q121255326) timeline

Source for these changes? — Huntster (t @ c) 12:02, 9 December 2023 (UTC)

Jonathan's Space Report (Q6272367) #826 estimates ignition at 13:02:47 (Q95064677) which is around T-2 in the telemetry on stream. 199 seconds later Booster 9 (Q123485215) telemetry is lost at 13:06:06 (Q95064945), which Scott Manley (Q59811938) synced in his analysis to the RUD. This also puts the telemetry loss of Ship 25 (Q123485096) at T+8:04 at 13:10:53 (Q95065325).

However if this is Wikipedia:Synthesis or appropriate treatment of numeric data is above my understanding of the rules --HLFan (talk) 17:49, 10 December 2023 (UTC)

While this is not Wikipedia, being able to cite sources means the veracity of the data is easier to qualify. JSR 826 and MyRGV are the two "reliable sources" I've seen that have published actual numbers, but even they give...confusing times. Per the launch stream, ignition occurred at T+0 (the shock wave is rather noticeable), and launch appears to be at T+0:04 (visual first movement, but JSR suggests T+0:06?). First stage self destruct clearly comes at T+3:17 on stream, but JSR says T+3:20 and MyRGV says T+3:22. This is strange. Second stage self destruct does appear to come at T+8:04, and both JSR and MyRGV agree with this. So, the question is what to believe. — Huntster (t @ c) 02:04, 11 December 2023 (UTC)

My guess at the reason both those sources agree on second stage self destruct is that by then they had to base their claims on the telemetry, which is why I also stuck with this. The latencies of the tracking cameras and the freeze of the drone footage don't make it better.

And while SpaceX should have the data, they only stated booster breakup at "more than three and a half minutes into the flight", which doesn't help either.

The NSF stream shows visually ignition at 13:02:51, lift-off at 13:02:55 and B9 RUD at NLT 13:06:10. Tim Dodd's production with a lower latency shows ignition at 13:02:47, lift-off at 13:02:52 and booster self-destruct at NLT 13:06:07.

So whilst we're definitely in the right ballpark, since the way timestamps are represented in wikidata is non-numerical, specifying the time to the correct decasecond or even deciminute is not possible. --HLFan (talk) 04:25, 11 December 2023 (UTC)