r/spacex • u/rSpaceXHosting Host Team • Jun 28 '21

Live Updates r/SpaceX Transporter-2 Launch Discussion and Updates Thread!

Welcome to the r/SpaceX Transporter-2 Launch Discussion and Updates Thread!

I'm u/hitura-nobad, your host for this launch.

Launch target: June 30 19:31 UTC (3:31 PM EDT)
Backup date TBA, typically the next day
Static fire Completed
Customer multiple
Payload multiple
Payload mass unknown
Deployment orbit ~500 km x ~97°, SSO
Vehicle Falcon 9 v1.2 Block 5
Core 1060
Past flights of this core 7 (GPS III SV03, Starlink-11, 14, 18, 22, 24, Türksat 5A)
Launch site SLC-40, Cape Canaveral Space Force Station, Florida
Landing LZ-1
Mission success criteria Successful deployment of payloads into contracted orbit

r/SpaceX Launch Weather Review

(15:10 UTC)

Weather-wise, so far everything looks pretty good, with showers, storms and cloud debris well away from the zone around the pad.

However, on days like these where the main threats are primarily diurnal convection which evolves quickly and unpredictably, we'll only really get a better idea within an hour or two from launch, at least beyond the 45th's mesoscale forecast and 70% GO.

(17:00 UTC)

With less than two hours to go until launch, the weather is still looking pretty good around the pad, better than yesterday so far, with showers and storm cells still keeping generally well clear of the 10 nmi/19 km zone around the pad, and like yesterday, cirrus blowoff from storm anvils to the west causing high-level cloudiness but seemingly well removed from their source such that they should not preculde launch.

(18:30 UTC)

Looks like there's just one modest cell that's the problem, that looks to pass directly over the pad. It should be on track to clear the area by the new scheduled launch time, but there are a few others downstream that may intrude on the party.

(by u/CAM-Gerlach)

Timeline

Time Update
T+58:07 Deployment starts
T+54:45 SECO2
T+54:44 Second stage relight
T+8:49 SECO and Norminal Orbital Insertion
T+8:31 Landing success
T+8:02 Landing startup
T+7:12 Reentry shutdown
T+6:50 Reentry startup
T+3:53 Fairing separation
T+3:45 Gridfins deployed
T+3:30 Boostback shutdown
T+2:46 Boostback startup
T+2:33 Second stage ignition
T+2:28 Stage separation
T+2:25 MECO
T+1:12 Max Q
T-0 Liftoff
T-60 Startup
T-3:30 Strongback retract
T-7:04 Engine Chill
T-12:51 Webcast live
T-20:09 20 minute vent
T-37:44 GO for Propellant load
T-1h 17m Now targeting 3:31 p.m. EDT for launch due to weather
^ 30 June Attempt ^
T-11 Scrub
T-11 Hold
T-7:00 Engine Chill
T-12:08 Webcast live
T-26:54 Fueling underway
2021-06-24 09:00:00 UTC Thread goes live

Watch the launch live

Stream Link
Official SpaceX Stream https://www.youtube.com/watch?v=sSiuW1HcGjA
Mission Control Audio TBA

Stats

☑️ 123rd Falcon 9 launch all time

☑️ 82nd Falcon 9 landing (if successful)

☑️ 104th consecutive successful Falcon 9 launch (if successful; excluding Amos-6)

☑️ 20th SpaceX launch this year

☑️ 8th flight of first stage B1060

Unofficial lists of individual spacecraft on this launch:

Resources

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186 Upvotes

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19

u/JakeSteam Jun 29 '21

Probably a really stupid question - how do commentators like Everyday Astronaut rehost the stream, yet are 20+ seconds ahead of the official stream!?

E.g. https://cdn.discordapp.com/attachments/114407194971209731/859506308675928074/unknown.png

8

u/[deleted] Jun 29 '21

[deleted]

1

u/JakeSteam Jun 29 '21

This makes a lot of sense! All the "just play it back in 2x" comments seemed sarcastic, since y'know, it's a LIVE stream. Good to know, never heard of that trick before. Thank you!

4

u/GameStunts Jun 29 '21

If you're watching on Youtube, you're at the mercy whether they're streaming directly to you or going via a local server. In order to stop 20,000 people in Europe causing 20,000 transatlantic connections for streaming, Youtube has local relay servers that it will stream to, and then you get your stream from that based on location.

Space-x is likely automatically targetted for this because of the almost guaranteed high numbers, but Everyday Astronaut, you might just be getting a more favourable connection to his stream.

I've also seen where EA was behind by 20 seconds, so it's just hit or miss.

4

u/WalshGamer Jun 29 '21

Fast forward the stream with speed options. It's never actually "live"

3

u/kinghuang Jun 29 '21

You're probably 20+ seconds behind on the official stream.

2

u/JakeSteam Jun 29 '21

Nope, refreshed both...

2

u/kinghuang Jun 29 '21

It could also be differences in the CDN POP that you happen to be connected to compared to Everyday Astronaut. The POP could be behind, or intentionally offsetting you, etc.

2

u/utrabrite Jun 29 '21

set speed to 2x till your stream catches up

0

u/[deleted] Jun 29 '21

I just noticed this, I opened the youtube stream on desktop through a browser and it was 15-20 seconds behind the same stream opened on my phone. I was using the same account and stream on both.

I'm guessing there's an API difference, maybe the browser is using a different endpoint/version than the mobile app.

People restreaming would use a higher quality source probably through direct API access.

1

u/WalshGamer Jun 29 '21

Loving all these over complicated answers. Just fast forward.

1

u/[deleted] Jun 29 '21

That's the interesting part, on the browser I can't fast forward, the browser says I'm at the latest, but then on my mobile app its definitely ahead of the browser.

1

u/brian9000 Jun 29 '21

Asking your question another way might be: why does the official stream delay their feed for so long?

1

u/kalpa11 Jun 29 '21

I've noticed that too! The only stream that is closer to the rehosted streams is the official SpaceX Twitter stream though that too is about half a second behind Everyday Astronaut

1

u/rocketflyfly Jun 29 '21

I was wondering this too