Author Topic: SpaceX F9 : USA 328-331 / Globalstar FM15 : SLC-40 : 19 June 2022 (04:27 UTC) (Read 98660 times)

Ken the Bin · « **Reply #80 on:** 06/19/2022 02:15 am »

Finally! L-1 weather forecast. 60% 'Go' for June 19. 80% 'Go' for June 20. Booster Recovery Weather risk is Low-Moderate for June 19. Upper-Level Wind Shear risk is Moderate for June 20. All other Additional Risk Criteria are Low.

LH2NHI · « **Reply #81 on:** 06/19/2022 02:29 am »

Perhaps the three upper stage engine start this time are due to plans to launch the Globalstar satellite directly at an operational altitude of 1410km instead of the usual 920km？

I'm also curious about how to attach only one satellite to the payload dispenser.
Normally, it should be an adapter that supports batch launching of 6 satellites. Is it a custom order?

LH2NHI · « **Reply #82 on:** 06/19/2022 03:03 am »

However, if I think in common sense, satellites of this size should be able to direct burn insertion or at least elliptical parking orbit + apogee kick, and ASDS should not be necessary.

Ignition of the second stage three times is still strange in this mission, Is it a orbital inclination change?

SES1-SECO:7min 15sec
SES2-SECO2:4sec
SES3-SECO3:8sec

Phillipsturtles · « **Reply #83 on:** 06/19/2022 03:11 am »

Well this makes it even more interesting https://twitter.com/StephenClark1/status/1538342187859161089

Orbiter · « **Reply #84 on:** 06/19/2022 03:32 am »

Quote from: Phillipsturtles on 06/19/2022 03:11 am

Well this makes it even more interesting https://twitter.com/StephenClark1/status/1538342187859161089

That doesn't seem totally surprising to me. Whatever the secondary payload (s) might be may not be required to in a particular orbital plane.

Ken the Bin · « **Reply #85 on:** 06/19/2022 03:44 am »

Mission Control Audio (video id 4riRoJWRE_Y):

daveglo · « **Reply #86 on:** 06/19/2022 03:52 am »

So, a fascinating tidbit: The normal weather display video from KSC has been replaced with the static display shown below.

Curiouser and curiouser . . . .

LouScheffer · « **Reply #87 on:** 06/19/2022 03:59 am »

Quote from: LH2NHI on 06/19/2022 03:03 am

However, if I think in common sense, satellites of this size should be able to direct burn insertion or at least elliptical parking orbit + apogee kick, and ASDS should not be necessary.

Ignition of the second stage three times is still strange in this mission, Is it a orbital inclination change?

SES1-SECO:7min 15sec
SES2-SECO2:4sec
SES3-SECO3:8sec

This is roughly compatible with this sequence:
(a) Launch into a 200 x 3200 km orbit (2 hour period)
(b) coast to 3200 km (about 1 hour, half an orbit)
(c) SECO2 to convert to a 1200 x 3200 orbit (dv about 240 m/s)
(d) release payload 'X'
(e) coast to bottom of orbit
(f) SECO3 to circularize at 1200 x 1200 (dv about 420 m/s)
(g) release Globalstar

Numbers are VERY approximate, but this roughly matches the burn durations and timings.

zubenelgenubi · « **Reply #88 on:** 06/19/2022 04:09 am »

T-20 minutes

daveglo · « **Reply #89 on:** 06/19/2022 04:11 am »

Stage 2 LOx load started (via MC audio).

zubenelgenubi · « **Reply #90 on:** 06/19/2022 04:20 am »

SpaceX, finally

daveglo · « **Reply #91 on:** 06/19/2022 04:26 am »

Stage 2 LOx load complete.

zubenelgenubi · « **Reply #92 on:** 06/19/2022 04:28 am »

Liftoff!

Orbiter · « **Reply #93 on:** 06/19/2022 04:32 am »

No video updates will be given on the progress of the second stage via SpaceX

ZachS09 · « **Reply #94 on:** 06/19/2022 04:39 am »

Quote from: Orbiter on 06/19/2022 04:32 am

No video updates will be given on the progress of the second stage via SpaceX

We did see SES-1 (Second Engine Start-1) on the Stage 2 camera, then the feed was cut.

LouScheffer · « **Reply #95 on:** 06/19/2022 04:41 am »

As suspected, no shots of fairing jettison.

Jarnis · « **Reply #96 on:** 06/19/2022 04:41 am »

No images shown from the front facing second stage camera, no fairing separation shown (or even mentioned!)

Very suspicious, and only reason that I can think of as to why... there is more inside the fairing than just Globalstar FM15.

Zed_Noir · « **Reply #97 on:** 06/19/2022 04:42 am »

Interesting that SpaceX have the upper stage telemetry readout on the webcast.

Lars-J · « **Reply #98 on:** 06/19/2022 04:42 am »

The stage landing (and orbital insertion) was a success:

https://twitter.com/nasaspaceflight/status/1538380876815417344?s=21&t=bTj2z2T2uwvkImelXYXdbQ

gongora · « **Reply #99 on:** 06/19/2022 04:45 am »

Anyone want to explain what this "parking orbit" has to do with launching a Globalstar sat?