Author Topic: SpaceX Falcon 9 : SAOCOM 1B : Cape Canaveral : August 30, 2020 (23:19 UTC)  (Read 200273 times)

Offline Herb Schaltegger

Was that a fairing half and parachute opening just to the left of the grid fin in the video at T+4:25? 
No
At 4:25 the first stage has conducted it's boostback burn and is far from the ballistic trajectory of the fairing halves, which were pushed further downtrack by over a minute of the second stage burn.

edit: typo and added a few words

I am aware of that.  The fairings should be way in front of the first stage.  But I've watched it several times and it sure looks to me a lot like a parafoil opening with something hanging underneath it.  Amazing coincidence?   

It's physically impossible for the shape you see to match the description you assign to it. It's a curve of high altitude clouds and the changing angle of the viewpoint and sunlight creating an illusion.
Ad astra per aspirin ...

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
T+50 minutes. Over the Indian Ocean.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline AncientU

  • Senior Member
  • *****
  • Posts: 6257
  • Liked: 4164
  • Likes Given: 6078
After the boostback burn, the perspective of the 1st stage camera that looks past the grid fins would be toward the departing second stage, and thus the fairings would be potentially in view.  Fairly sure that is what we saw.
"If we shared everything [we are working on] people would think we are insane!"
-- SpaceX friend of mlindner

Offline FlattestEarth

  • Full Member
  • **
  • Posts: 201
  • Usa
  • Liked: 147
  • Likes Given: 76
Was that a fairing half and parachute opening just to the left of the grid fin in the video at T+4:25? 
No
At 4:25 the first stage has conducted it's boostback burn and is far from the ballistic trajectory of the fairing halves, which were pushed further downtrack by over a minute of the second stage burn.

edit: typo and added a few words

I am aware of that.  The fairings should be way in front of the first stage.  But I've watched it several times and it sure looks to me a lot like a parafoil opening with something hanging underneath it.  Amazing coincidence?   

 It is just a piece of the the very common ring of ice that forms around the grid fin attachment points and makes an appearance in pretty much every webcast.

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
AOS.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
Engine and satellite views.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
One minute to GNOMES 1 separation.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
Confirmation of GNOMES 1 separation. Out of view.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
Confirmation of Tyvak-0172 separation. SpaceX did not show the actual separation, but we can see the door open on the cubesat container.
« Last Edit: 08/31/2020 12:25 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline AC in NC

  • Senior Member
  • *****
  • Posts: 2484
  • Raleigh NC
  • Liked: 3630
  • Likes Given: 1950
After the boostback burn, the perspective of the 1st stage camera that looks past the grid fins would be toward the departing second stage, and thus the fairings would be potentially in view.  Fairly sure that is what we saw.

Impossible.  The S2 travelled how many miles downrange before the fairings deployed?  The S1 boosted back how many miles and how much altitude change?  The fairings fall how far and for how many minutes beyond the 4:xx mark to the lower atmosphere before the parachutes deploy.

It was clouds way down below and the alleged "parachute" was the spinning ice ring-bit.

Edit to Add:  The Fairings deployed at 3m47s at 183km and would need to do some serious speed-records to get into the S1 camera view in 34 seconds.
« Last Edit: 08/31/2020 12:52 am by AC in NC »

Online Chris Bergin

Support NSF via L2 -- Help improve NSF -- Site Rules/Feedback/Updates
**Not a L2 member? Whitelist this forum in your adblocker to support the site and ensure full functionality.**

Online Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 39463
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 33125
  • Likes Given: 8907
End of webcast.

Congratulations to SpaceX, CONAE, Tyvak and PlanetiQ for the successful launch!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

  • Space Savant
  • Senior Member
  • *****
  • Posts: 8496
  • Roanoke, TX
  • Liked: 2416
  • Likes Given: 2104
I hope that brief LOS before Tvyak separation wasn’t intentional.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline Alexphysics

  • Full Member
  • ****
  • Posts: 1625
  • Spain
  • Liked: 6027
  • Likes Given: 952
After the boostback burn, the perspective of the 1st stage camera that looks past the grid fins would be toward the departing second stage, and thus the fairings would be potentially in view.  Fairly sure that is what we saw.

There is in no way shape or form that you can:

1. See the deployed fairings from the booster at any point in time unless things go rrrrreally wrong

2. To even see the fairings with parafoil deployed when the booster hadn't even reentered yet

Also, shortly after boostback burn the first stage rotates to engines first and you're actually starting to look down on Earth on that shot not up and away to the second stage trajectory.

It's ice. There are half a dozen vents on the interstage from the MVac and other associated system. What would actually be weird is if we didn't see anything AT ALL coming off from there.

Offline DAZ

  • Full Member
  • *
  • Posts: 162
  • Everett WA
  • Liked: 165
  • Likes Given: 1
I don’t know if this is the correct thread but it does pertain to this thread.

Did anybody notice the following?
Before the launch 1 (I believe it is the more northern antenna) of the 2 tracking antennas in Boca Chica was pointed what looked to be due east, toward Florida.  The 2nd antenna (the more southern of the 2) was at Nader zenith.
This changed shortly before launch.  The northern antenna went to Nader zenith and the southern antenna was now pointed east.  At launch, the southern antenna appeared to track an object traveling south on the horizon.  At about this time there was a call out for Texas acquisition of signal.  The antenna appeared to track until it was west of due south.  The antenna paused for a considerable amount of time then changed its orientation as if to pick up tracking and object east of due north.  It now appears to be tracking an object on the horizon traveling south.

[zubenelgenubi: edited nadir to zenith.  Ralph Nader is the author of "Unsafe at Any Speed."]
« Last Edit: 09/02/2020 01:04 am by zubenelgenubi »

Offline gongora

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 10438
  • US
  • Liked: 14355
  • Likes Given: 6148
I hope that brief LOS before Tvyak separation wasn’t intentional.

It was obviously intentional

Offline gongora

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 10438
  • US
  • Liked: 14355
  • Likes Given: 6148
Object 2020-059A (SAOCOM 1B) in 620x603km, 97.87deg orbit

Offline DAZ

  • Full Member
  • *
  • Posts: 162
  • Everett WA
  • Liked: 165
  • Likes Given: 1
I'm sorry it appears I need to apologize.  The term I should've used with Zenith instead of Nader.

Offline Lars-J

  • Senior Member
  • *****
  • Posts: 6809
  • California
  • Liked: 8487
  • Likes Given: 5385
Congrats to everyone involved - that was an interesting trajectory.  :)

It passed right over the Miami coast, which at first seemed dangerous, but then I realized that the vehicle was executing a turn, so the estimated impact point was always quite a bit out to sea.

Another neat thing - seeing the 1st stage land in front of the Blue Origin launch pad infrastructure certainly makes the size of that infrastructure apparent... It is massive.  :o

Offline Lars-J

  • Senior Member
  • *****
  • Posts: 6809
  • California
  • Liked: 8487
  • Likes Given: 5385
Yet another cool thing about this landing - the shot of the vapor cone effect through the grid fins as the stage was slowing down from supersonic to subsonic.  8)

https://en.wikipedia.org/wiki/Vapor_cone
« Last Edit: 08/31/2020 01:31 am by Lars-J »

Tags:
 

Advertisement NovaTech
Advertisement Northrop Grumman
Advertisement
Advertisement Margaritaville Beach Resort South Padre Island
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
1