Author Topic: SpaceX F9 : Starlink v1.0 L11 : KSC LC-39A : September 3, 2020 (12:46 UTC) (Read 74498 times)

docmordrid · « **Reply #100 on:** 09/03/2020 12:50 pm »

The host also reported laser link birds are in orbit and have been tested.

Steven Pietrobon · « **Reply #101 on:** 09/03/2020 12:50 pm »

Fairing separation.

T+4 minutes.

Steven Pietrobon · « **Reply #102 on:** 09/03/2020 12:51 pm »

T+5 minutes. Nominal trajectories.

Steven Pietrobon · « **Reply #103 on:** 09/03/2020 12:52 pm »

T+6 minutes.

Steven Pietrobon · « **Reply #104 on:** 09/03/2020 12:53 pm »

T+7 minutes. Entry burn.

Steven Pietrobon · « **Reply #105 on:** 09/03/2020 12:54 pm »

T+8 minutes.

Steven Pietrobon · « **Reply #106 on:** 09/03/2020 12:55 pm »

Touchdown!

T+9 minutes.

Chris Bergin · « **Reply #107 on:** 09/03/2020 12:56 pm »

https://twitter.com/NASASpaceflight/status/1301504236287647744

Steven Pietrobon · « **Reply #108 on:** 09/03/2020 12:56 pm »

Good orbit.

T+10 minutes.

Steven Pietrobon · « **Reply #109 on:** 09/03/2020 12:58 pm »

Upcoming event.

00:14:47 Starlink satellites deploy

Steven Pietrobon · « **Reply #110 on:** 09/03/2020 01:00 pm »

One minute to separation.

Steven Pietrobon · « **Reply #111 on:** 09/03/2020 01:02 pm »

Away they go!

Steven Pietrobon · « **Reply #112 on:** 09/03/2020 01:03 pm »

End of webcast.

Congratulations to SpaceX for the successful launch of another 60 Starlink satellites!

FutureSpaceTourist · « **Reply #113 on:** 09/03/2020 01:31 pm »

https://twitter.com/julia_bergeron/status/1301510350395912198

Quote

What a stunning launch of the twelfth #Starlink mission! The view and sound from the Canaveral Wildlife Refuge was one of the best to date. Join the discussion on the @NASASpaceflight forums.
forum.nasaspaceflight.com/index.php?topi…

FutureSpaceTourist · « **Reply #114 on:** 09/03/2020 01:32 pm »

https://twitter.com/johnkrausphotos/status/1301511007907590144

Quote

Liftoff! Falcon 9 ascends to space this morning with the twelfth batch of Starlink satellites.

📷: Me for @SuperclusterHQ

https://twitter.com/johnkrausphotos/status/1301509378743435264

Quote

Falcon 9 in flight

By @johnkrausphotos for Supercluster

Edit to add:

https://twitter.com/superclusterhq/status/1301525408807038976

Quote

The #SpaceX Falcon 9 blasts off from Kennedy Space Center Pad 39A this morning with a new batch of Starlink satellites

Captured by @johnkrausphotos for Supercluster

OneSpeed · « **Reply #115 on:** 09/03/2020 02:31 pm »

Here is the Starlink V1.0 L11 telemetry. The L10 telemetry had a glitch at the end of the S2 burn, so I'm comparing with L7 instead.

There are a few differences:

1. The L11 throttle bucket is slightly earlier than previous missions.
2. Although an S2 throttle down was announced at T+08:00 on the mission webcast, there is no evidence of it in the data.
3. Both launches inserted at 215km altitude, but L11 was travelling 6m/s slower, at 7535m/s. Presumably the apogee will be slightly less.

FutureSpaceTourist · « **Reply #116 on:** 09/03/2020 03:43 pm »

SpaceX launch photo (I assume by Ben Cooper)

https://twitter.com/spacex/status/1301545239971127301

Quote

Falcon 9 launches 60 Starlink satellites to orbit – Starlink will deliver high-speed broadband internet to locations where access has been unreliable, expensive, or completely unavailable → starlink.com

Dean47 · « **Reply #117 on:** 09/03/2020 04:10 pm »

I was looking at the fantastic data plots provided by OneSpeed and had a question for the rocket scientists in the forum. This may have been discussed at another forum. If so, I apologize in advance. My question is: As I recall, during the manned Dragon II launch Bob and Doug mentioned that the second stage ride seemed much rougher than first stage. The acceleration data in OneSpeed's chart seem to show a gradual increase in "noise" starting about halfway through the second stage burn. The noise, or vibration, gets progressively worse toward the end of the burn and the data from the latest launch (L11) even shows signs of periodic acceleration spikes. Does this relate to the "rough ride" noted by the astronauts?

FutureSpaceTourist · « **Reply #118 on:** 09/03/2020 04:55 pm »

twitter.com/trevormahlmann/status/1301505172259123200

Quote

12th batch of Starlink: on their way to LEO🚀
📸for @ArsTechnica

⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…

https://twitter.com/trevormahlmann/status/1301508646216577025

Quote

Nothing like starting a day off on the Space Coast with a rocket launch🚀
Liftoff of the 12th Starlink mission, reflected in the @NASAKennedy turn basin🛰

⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…

Edit to add:

https://twitter.com/rdanglephoto/status/1301560981961805825

Quote

The #SpaceX #Falcon9 launches 60 more #Starlink sats to orbit and landed the first stage on the droneship 'Of Course I Still You'. Pretty much non stop these days!

billh · « **Reply #119 on:** 09/03/2020 05:35 pm »

Quote from: Dean47 on 09/03/2020 04:10 pm

I was looking at the fantastic data plots provided by OneSpeed and had a question for the rocket scientists in the forum. This may have been discussed at another forum. If so, I apologize in advance. My question is: As I recall, during the manned Dragon II launch Bob and Doug mentioned that the second stage ride seemed much rougher than first stage. The acceleration data in OneSpeed's chart seem to show a gradual increase in "noise" starting about halfway through the second stage burn. The noise, or vibration, gets progressively worse toward the end of the burn and the data from the latest launch (L11) even shows signs of periodic acceleration spikes. Does this relate to the "rough ride" noted by the astronauts?

That's quite possible. Small fluctuations in thrust will product small fluctuations in acceleration. As the fuel is consumed, the mass of the vehicle decreases and the amplitude of the acceleration fluctuations increases.