Author Topic: SpaceX F9 : Starlink v1.0 L21 : KSC LC-39A : 14 March 2021 (10:01 UTC)  (Read 52101 times)

Online zubenelgenubi

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This is the next launch, in three days time!
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline kdhilliard

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This is the next launch, in three days time!

OCISLY is still in port.  That's her bow on the left of this Fleetcam still.
(Link to start of L17 mission posts regarding the tow chain issue which delayed OCISLY's entrance.)
When would she have to leave port to make that launch date?
« Last Edit: 03/11/2021 10:46 am by kdhilliard »

Offline Raul

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Issued NOTMAR messages of launch NET 14 March 09:44 UTC.
Alternative launch days: 15 March 9:24 UTC; 16 March 9:03 UTC; 17 March 8:41 UTC; 18 March 8:20 UTC; 19 March 7:58 UTC; 20 March 7:36 UTC; 21 March 7:15 UTC; 22 March 6:53 UTC
Quote
111015Z MAR 21
NAVAREA IV 212/21(11,26).
WESTERN NORTH ATLANTIC.
FLORIDA.
1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING
   140839Z TO 141137Z MAR, ALTERNATE
   150819Z TO 151117Z, 160758Z TO 161056Z,
   170736Z TO 171034Z, 180715Z TO 181013Z,
   190653Z TO 190951Z, 200631Z TO 200929Z,
   210610Z TO 210908Z AND 220548Z TO 220846Z MAR
   IN AREAS BOUND BY:
   A. 28-39-45N 080-38-13W, 29-41-00N 079-27-00W,
      29-29-00N 079-21-00W, 28-32-00N 080-19-00W,
      28-27-23N 080-31-33W.
   B. 31-44-00N 077-14-00W, 33-17-00N 076-03-00W,
      33-31-00N 074-59-00W, 33-10-00N 074-36-00W,
      32-27-00N 074-46-00W, 31-25-00N 076-56-00W.
2. CANCEL NAVAREA IV 205/21.
3. CANCEL THIS MSG 220946Z MAR 21.

111002Z MAR 21
HYDROPAC 785/21(61,75,76).
SOUTHERN INDIAN OCEAN.
DNC 03, DNC 04, DNC 05.
1. HAZARDOUS OPERATIONS, SPACE DEBRIS
   141048Z TO 141325Z MAR, ALTERNATE
   151028Z TO 151305Z, 161007Z TO 161244Z,
   170945Z TO 171222Z, 180924Z TO 181201Z,
   190902Z TO 191139Z, 200840Z TO 201117Z,
   210819Z TO 211056Z AND 220757Z TO 221034Z MAR
   IN AREA BOUND BY
   29-43S 060-07E, 24-55S 064-27E,
   38-45S 084-30E, 45-12S 099-45E,
   49-46S 119-13E, 50-42S 138-19E,
   48-50S 156-44E, 51-46S 158-08E,
   54-42S 148-32E, 56-20S 131-03E,
   55-52S 107-50E, 49-11S 085-05E,
   34-32S 064-13E.
2. CANCEL HYDROPAC 753/21.
3. CANCEL THIS MSG 221134Z MAR 21.

Offline FutureSpaceTourist

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L-3 launch weather forecast is 90% GO

Offline Conexion Espacial

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The droneship is already heading to the recovery zone
https://twitter.com/TGMetsFan98/status/1370007860072087555
I publish information in Spanish about space and rockets.
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Offline SPKirsch

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Crosspost
https://twitter.com/julia_bergeron/status/1370169911197192206
Quote
#SpaceXFleet update:

Finn Falgout/JRTI/B1058 has not had an AIS ping. (This is normal- ghost tug I tell ya)

Hawk/OCISLY are well on their way going 7 knots towards the Starlink LZ.

Fairing scoopers Searcher/Navigator are almost to Morehead City to drop off their haul.
« Last Edit: 03/12/2021 01:03 am by SPKirsch »

Online zubenelgenubi

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The LV should be transported to the pad soon, assuming a Static Fire before the March 14 launch.
We're awaiting news of the identity of the first stage.
« Last Edit: 03/12/2021 07:21 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline RocketLover0119

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Worth noting this mission is getting kinda close to twilight territory. Launch at 5:44 comes about just under 2 hours to sunrise (clock moving forwards changes sunrise time). People along the east coast will have a show put on if the time sticks.
"The Starship has landed"

Online gongora

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https://twitter.com/TSKelso/status/1370415820891852800
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CelesTrak has pre-launch SupTLEs for the #Starlink V1.0-21 launch set for Mar 14 at 0946 UTC. Deployment of 60 satellites is set for 10:51:01.860 UTC: https://celestrak.com/NORAD/elements/supplemental/.

Offline scr00chy

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The LV should be transported to the pad soon, assuming a Static Fire before the March 14 launch.

If it's B1060.6, I suspect they might skip SF. Probably not for B1051.9, though.

Offline RocketLover0119

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The LV should be transported to the pad soon, assuming a Static Fire before the March 14 launch.

If it's B1060.6, I suspect they might skip SF. Probably not for B1051.9, though.

Recent core 58 static fired before flight and was on its sixth flight.
« Last Edit: 03/12/2021 05:59 pm by RocketLover0119 »
"The Starship has landed"

Offline AndrewRG10

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https://twitter.com/SpaceX/status/1370556528323751938
Quote
Targeting Sunday, March 14 at 6:01 a.m. EDT for Falcon 9's next launch of 60 Starlink satellites. The first stage booster supporting this mission has completed eight flights to date http://spacex.com/launches
Looks like B1051 is doing another flight with no static fire
« Last Edit: 03/13/2021 01:11 am by AndrewRG10 »

Online zubenelgenubi

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Quote from: SpaceX tweet
Targeting Sunday, March 14 at 6:01 a.m. EDT for Falcon 9's next launch of 60 Starlink satellites. The first stage booster supporting this mission has completed eight flights to date.
http://spacex.com/launches
I wonder why the launch time shifted 17 minutes later?

Edit: USA "springs forward" to Daylight Savings Time at 2 am local time on Sunday, March 14.

6:01 am EDT + 4 hours = 1001 UTC
« Last Edit: 03/13/2021 01:31 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.) My current avatar is saying "i wants to go uppies!" Yes, there are God-given rights. Do you wish to gainsay the Declaration of Independence?

Offline Ken the Bin

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SpaceX has updated their Launches webpage for this launch.



Offline kdhilliard

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I wonder why the launch time shifted 17 minutes later?

Strange.  But a 06:01 a.m. EDT launch time does put it 91 minutes before the Cape's 07:32 sunrise.

Has anyone calculated when and where it should break into sunlight?

The the most recent pre-dawn launch was the L8 Starlink mission on 6 June, 2020 at 05:21 a.m. EDT, 65 minutes before the Cape's sunrise, and that was a couple weeks before the summer solstice, when sunrise became earlier going north.  It broke into the sunlight shortly after stage separation, at about T+03:00, and yielded some great views which can been seen in its thread starting here.  (My favorite -- second tweet.)
* L8 webcast, keyed to stage separation.

Tomorrow's launch is 26 minutes more before sunrise and a couple weeks before the equinox, not the solstice, so that works against it, and I'm doubtful it will put on as good a show for those in Florida.

Offline Rekt1971

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The website says: "Falcon 9’s fairing previously flew on the Transporter-1 mission." Usually, they say one fairing half, so in this case it could mean that both fairings are reused from Transporter-1.

Offline CorvusCorax

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A quick first order aproximation. The earth has ~40000 km circumference and turns once in 24 hours. That means in 30 minutes a point on the equator moves by around 833 km.

Cape canaveral is at ~28° latitude, cos(28°) is 0.88 which makes it only 733km.

But it's only 26 minutes, that makes it 635km -- still too far for to make the lightshow visible from the cape

But Stage2 still rises in altitude - stage sep is at aprox 80km altitude - at T+3:00 it's at aprox 85 km.

26 minutes is equivalent to 6.5° earth rotation. tan(6.5°)=h/l - h is tan(6.5°)*635km which is 72km - so the stage is also visible if it's at 85+72= 157 km
this is an altitude it reaches at around T+5:30

however the stage also covers distance in that time. the altitude needed to break sunlight is 72 km- (72/635) km per kilometer traveled
the altitude stage2 reaches is aprox 72/2.5 km/min

during that time stage2 accelerates from 8000 km/h to aprox 12000 km/h, so it moves at aprox 10000 km/h on average, reaching the extra 72km 416 km further downrange - aprox 0 km + (72/416) km per kilometer traveled

so we need to solve 0+(72/416)x=72-(72/635)x

as such the point where stage2 breaks into sunlight would be around 251km further downrange than on the L8 flight - assuming similar trajectory and ignoring some linearization errors

Edit: at around T+4:36 give or take 10 seconds

that's pretty far, but still visible from the launchsite, considering the stage by then is around 85+42= 127km high-ish - but we'll miss the plume separation effects :(
« Last Edit: 03/13/2021 09:48 am by CorvusCorax »

Offline scr00chy

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Visual mission profile by ElonX.net

Offline HVM

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Are UTC time(s) right? I think 6:01 EST is 11:01 UTC (yes but not)

Ok  it's "the second Sunday in March" and Summer time starts in there... (Snowbanks higher than my windowsills don't make me think such things)
« Last Edit: 03/13/2021 02:41 pm by HVM »

Online gongora

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Are UTC time(s) right? I think 6:01 EDT is 11:01 UTC

Daylight savings time

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