Author Topic: SpaceX F9 : Starlink group 2-4 : VSFB SLC-4E : 19 January 2023 (15:43 UTC)  (Read 56121 times)

Offline zubenelgenubi

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Thread for the Starlink 2-4 group launch.

NSF Threads for Starlink 2-4: Discussion

Launch January 19, 2023 at 7:43 am PST (15:43 UTC), from Vandenberg SLC-4E, on booster 1075.1 1061-11.  Landing will be aboard Of Course I Still Love You.

Payload 51 52 Starlink satellites to 70 degree inclination on a south-southeastern trajectory.  Initial orbit 215 x 335 km.

Starlink v1.5 satellite mass is now about 300kg after the addition of laser ISL terminals.

Please use the Starlink Discussion Thread for all general discussion on Starlink.

Check the Starlink Index Thread for links to more Starlink information.



L2 SpaceX: https://forum.nasaspaceflight.com/index.php?board=60.0
« Last Edit: 01/19/2023 04:53 am by Galactic Penguin SST »
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Offline zubenelgenubi

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Cross-post:
1703-EX-ST-2022
SpaceX Mission 1599 Starlink Group 2-4 from SLC-4E,
ASDS    North  29  11  36   West  117  45  52
NET November [November 7]

How will the launch schedule shake out with Starlink 4-31 also pending?

Edit October 21: Starlink 4-31 scheduled for October 28 UTC.
« Last Edit: 10/23/2022 04:59 am by zubenelgenubi »
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Offline AmigaClone

Cross-post:
1703-EX-ST-2022
SpaceX Mission 1599 Starlink Group 2-4 from SLC-4E,
ASDS    North  29  11  36   West  117  45  52
NET November [November 7]

How will the launch schedule shake out with Starlink 4-31 also pending?

I suspect that Starlink Group 2-4 might see a launch attempt between 10 and 15 November 2022. If it doesn't launch in that window, I can see it possibly not launching until 2023. 

Offline zubenelgenubi

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NextSpaceFlight, updated October 23:
First stage is 1061.11.
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Offline zubenelgenubi

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Cross-post:
http://www.spacearchive.info/vafbsked.htm [Oct 22 update]
Quote
NOV 29    To be announced    Falcon 9    SLC-4E    Vehicle will launch several Starlink satellites into orbit.

This launch would be 6 days before SWOT; apparently too close together in time for back-to-back Vandenberg Falcon 9 launches--unless this is to be another SpaceX improvement.

Edit: SWOT first stage LZ-4 landing removes OCISLY availability difficulty.

However...

I will clarify my thoughts by stating, as gongora does below, I don't think SpaceX would schedule a Starlink launch 6 days before SWOT.  A stronger source is needed.
« Last Edit: 10/26/2022 02:29 am by zubenelgenubi »
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Offline wannamoonbase

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Cross-post:
http://www.spacearchive.info/vafbsked.htm [Oct 22 update]
Quote
NOV 29    To be announced    Falcon 9    SLC-4E    Vehicle will launch several Starlink satellites into orbit.

This launch would be 6 days before SWOT; apparently too close together in time for back-to-back Vandenberg Falcon 9 launches--unless this is to be another SpaceX improvement.

Well SWOT should be a RTLS landing, so the ASDS should not be a limitation.

6 days seems very short, especially for an external customer like NASA.
Wildly optimistic prediction, Superheavy recovery on IFT-4 or IFT-5

Offline zubenelgenubi

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Cross-post:
http://www.spacearchive.info/vafbsked.htm [Oct 22 update]
Quote
NOV 29    To be announced    Falcon 9    SLC-4E    Vehicle will launch several Starlink satellites into orbit.

This launch would be 6 days before SWOT; apparently too close together in time for back-to-back Vandenberg Falcon 9 launches--unless this is to be another SpaceX improvement.

Well SWOT should be a RTLS landing, so the ASDS should not be a limitation.

6 days seems very short, especially for an external customer like NASA.
https://forum.nasaspaceflight.com/index.php?topic=41678.msg2355094#msg2355094
SFN Launch Schedule lists SWOT with an ASDS booster landing.
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Offline Alexphysics

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Except we know SWOT is going to be RTLS from the FCC permits. https://forum.nasaspaceflight.com/index.php?topic=45440.msg2420545#msg2420545

RTLS from Vandy, NET early December.  Kinda lines up with SWOT.
1752-EX-ST-2022
« Last Edit: 10/26/2022 01:40 am by zubenelgenubi »

Offline russianhalo117

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Except we know SWOT is going to be RTLS from the FCC permits. https://forum.nasaspaceflight.com/index.php?topic=45440.msg2420545#msg2420545
As always this is subject to change.

Offline gongora

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I wouldn't believe that November 29 date without a much better source.  No way they have a Starlink schedule from Vandy six days before SWOT.

Of course, also possibility SWOT gets pushed back.  SWOT updates below (date of update - from who - launch target):
Aug 25 - NASA - Dec 5
Sep 6 - Thales - NET Dec 5
Oct 17 - Thales - Dec
Oct 20 - NASA - Dec

The Dec 5 SWOT launch date estimate has weakened to just December over the last couple months
« Last Edit: 10/26/2022 01:19 pm by realnouns »

Offline gongora

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That's another possibility.

Online Galactic Penguin SST

NextSpaceFlight, updated November 10:
Launch November 17 03:22 UTC
= November 16, 7:22 pm PST
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Offline Ken the Bin

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This generic NGA Hazardous Operations notice appears to be for this launch.

Quote from: NGA
081911Z NOV 22
NAVAREA XII 857/22(GEN).
EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS:
   A. 170242Z TO 170710Z NOV, ALTERNATE
      180228Z TO 180656Z, 190214Z TO 190642Z,
      200201Z TO 200628Z, 210147Z TO 210614Z NOV
      IN AREA BOUND BY
      34-40.00N 120-40.00W, 34-40.00N 120-17.00W,
      34-27.00N 120-17.00W, 34-08.00N 120-05.00W,
      32-40.00N 119-25.00W, 32-40.00N 119-31.00W,
      33-18.00N 119-52.00W, 33-55.00N 120-17.00W,
      34-22.00N 120-34.00W, 34-33.00N 120-38.00W.
   B. 170242Z TO 170711Z NOV, ALTERNATE
      180228Z TO 180657Z, 190214Z TO 190643Z,
      200201Z TO 200629Z, 210147Z TO 210615Z NOV
      IN AREA BOUND BY
      30-11.00N 118-18.00W, 30-11.00N 117-56.00W,
      29-47.00N 117-39.00W, 28-33.00N 117-14.00W,
      28-33.00N 117-32.00W, 29-33.00N 118-17.00W.
   C. 170435Z TO 170816Z NOV, ALTERNATE
      180421Z TO 180802Z, 190407Z TO 190748Z,
      200354Z TO 200734Z, 210340Z TO 210720Z
      IN AREA BOUND BY
      35-19.00N 144-30.00W, 36-12.00N 142-29.00W,
      52-02.00N 153-16.00W, 51-09.00N 155-54.00W.

Offline OneSpeed

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This generic NGA Hazardous Operations notice appears to be for this launch.

Map from the NGA notice. The coordinates do appear to match the 70 orbital inclination. ASDS 662km downrange.
« Last Edit: 11/13/2022 07:02 am by OneSpeed »

Offline VLN

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Quote from: NGA
081911Z NOV 22
NAVAREA XII 857/22(GEN).
EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS:
   A.

Where do you find this? The links I use at msi.nga.mil are now 4 days stale, ending at no. 846.

Offline Ken the Bin

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Quote from: NGA
081911Z NOV 22
NAVAREA XII 857/22(GEN).
EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS:
   A.

Where do you find this? The links I use at msi.nga.mil are now 4 days stale, ending at no. 846.

I don't use the website, I subscribe to the mailing lists.  The website is always behind, though not usually four days behind.

Offline Ken the Bin

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A cancel-and-replace NGA notice.  In addition to slipping to November 17/18, the time has also moved 1 hour and 20 minutes later (relative to the original time for November 18 UTC, not the November 17 time).

Quote from: NGA
150000Z NOV 22
NAVAREA XII 876/22(GEN).
EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS:
   A. 180348Z TO 180656Z NOV, ALTERNATE
      190334Z TO 190642Z, 200320Z TO 200628Z,
      210306Z TO 210614Z, 220252Z TO 220600Z NOV
      IN AREA BOUND BY
      34-40.00N 120-40.00W, 34-40.00N 120-17.00W,
      34-27.00N 120-17.00W, 34-08.00N 120-05.00W,
      32-40.00N 119-25.00W, 32-40.00N 119-31.00W,
      33-18.00N 119-52.00W, 33-55.00N 120-17.00W,
      34-22.00N 120-34.00W, 34-33.00N 120-38.00W.
   B. 180348Z TO 180657Z NOV, ALTERNATE
      190334Z TO 190643Z, 200320Z TO 200629Z,
      210306Z TO 210615Z, 220252Z TO 220601Z NOV
      IN AREA BOUND BY
      30-11.00N 118-18.00W, 30-11.00N 117-56.00W,
      29-47.00N 117-39.00W, 28-33.00N 117-14.00W,
      28-33.00N 117-32.00W, 29-33.00N 118-17.00W.
   C. 180541Z TO 180802Z NOV, ALTERNATE
      190527Z TO 190748Z, 200513Z TO 200734Z,
      210459Z TO 210720Z, 220445Z TO 220706Z NOV
      IN AREA BOUND BY
      35-19.00N 144-30.00W, 36-12.00N 142-29.00W,
      52-02.00N 153-16.00W, 51-09.00N 155-54.00W.
2. CANCEL NAVAREA XII 857/22.
3. CANCEL THIS MSG 220806Z NOV 22.

Offline VLN

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A cancel-and-replace NGA notice.  In addition to slipping to November 17/18, the time has also moved 1 hour and 20 minutes later (relative to the original time for November 18 UTC, not the November 17 time).

Same exact footprints of the three zones. As you say, the start of the window for each day has shifted by 80 min, but the end has not changed. So the window is 80 min shorter each day. If the launch time also shifts by 80 min, that suggests the orbit is the same except for a 20 deg eastward shift of the ascending node. That's a significant change in the orbit, but I don't know what it means for the distribution of satellites.

Offline AmigaClone

A cancel-and-replace NGA notice.  In addition to slipping to November 17/18, the time has also moved 1 hour and 20 minutes later (relative to the original time for November 18 UTC, not the November 17 time).

Same exact footprints of the three zones. As you say, the start of the window for each day has shifted by 80 min, but the end has not changed. So the window is 80 min shorter each day. If the launch time also shifts by 80 min, that suggests the orbit is the same except for a 20 deg eastward shift of the ascending node. That's a significant change in the orbit, but I don't know what it means for the distribution of satellites.

Per the 27 April 2021 modification of the original Starlink constellation Group 2 has 36 orbital planes with 20 satellites per plane. Unless they are targeting certain planes based on those occupied by satellites from the first one, it might not make much difference exactly when the launch time occurs.

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