Author Topic: SpaceX F9 : Starlink 5 (v1.0 L4) : Feb. 17, 2020 : Master Thread  (Read 138496 times)

Offline Raul

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Map of Launch Hazard Areas of this mission, according to issued NOTMAR/MOTAM messages.

B1056.4 droneship landing as usual 629km downrange, based on issued FCC application.
Orange Area B shorter than in previous Starlink launches. Fairing recovery vessels stationed ~700km downrange (~50km closer than last time, as the fairing deployment is 14sec earlier).

According to Celestrak pre-launch TLEs derived from SpaceX data, nominal direct insertion elliptical orbit would be 220/393km/53°.
Another difference, no NOTMAR/MOTAMs Hazard Area for Stage2 Debris Reentry issued for this launch.

Online FutureSpaceTourist

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Spare a thought for the recovery crews when launches are delayed

twitter.com/spacexfleet/status/1229138403905736709

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🎵 The crew on the droneship go round and round, round and round, round and round.

The crew on the droneship go round and round, all through the ocean.

https://twitter.com/spacexfleet/status/1229139770779078666

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The Fleet has been circling the LZ since the early hours of Friday morning. If you've ever been on a boat in rough seas, you may know that it is so much better to keep moving rather than sitting still. Just ask anyone on @StarFleetTours during the IFA!

Online FutureSpaceTourist

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https://twitter.com/wordsmithfl/status/1229142516076875776

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Drove by SpaceX Pad 40 at 3:15 PM EST.  The F9 is still horizontal on the pad.

Offline FlattestEarth

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No circularization burn is interesting.  The sats have enough fuel to circularize and raise and keep? 

Fairing deploy is earlier, drone ship is closer, but entry burn complete and landing are delayed.  Does this mean steeper trajectory?
« Last Edit: 02/17/2020 12:53 am by FlattestEarth »

Online FutureSpaceTourist

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NSF pre-launch live stream in just under half an hour


Offline Chris Bergin

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Online FutureSpaceTourist

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https://twitter.com/johnkrausphotos/status/1229185951269883904

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SpaceX’s fifth Starlink mission is slated to launch from Cape Canaveral at 10:05am EST Monday morning.

This Falcon 9, seen horizontal here, will be launching for the fourth time. Its previous missions were CRS-17, CRS-18, and JCSAT-18/Kacific1.

https://twitter.com/trevormahlmann/status/1229186516855001088

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My remote cameras are set for the fifth batch of 60 @SpaceX Starlink satellites. Here's a sneak peek at what some of they are seeing and what I am hoping to capture framing-wise.

Stay tuned here for my latest Starlink mission photos: tmahlmann.com/photos/Rockets…

Offline su27k

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No circularization burn is interesting.  The sats have enough fuel to circularize and raise and keep? 

I don't think fuel is a concern given the efficiency of the thrusters, I suspect the main concern is how to maintain the orbit and avoid being dragged down quickly by atmosphere friction. Starlink-46 (44246) from the v0.9 batch has been running around between 200km and 300km region, my guess is it is used to test the procedures needed to operate in this very low orbit.

Offline Steven Pietrobon

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I like the new launch profile, as I don't need to stay awake for so long at 2 am in the morning! :-)
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline AndrewRG10

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I like the new launch profile, as I don't need to stay awake for so long at 2 am in the morning! :-)
Agreed, last time you and I would've been up till around 1 am. Only disappointment is that fairing catch won't be live, and I see no reason to wait for the tweet saying they both got very close, and no video.

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https://twitter.com/cosmic_penguin/status/1229204095841390592

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Tonight, teams @SpaceX Pad-40 prepare to stand Falcon 9 up vertically ahead of tomorrow’s StarLink mission Launch attempt🚀

Launch Window opens at 10:05am EST
@HoverSlamSpace

Full HD Gallery & Prints Avalible: hoverslamphotography.smugmug.com/Launch/Falcon-…

Offline Chris Bergin

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Online FutureSpaceTourist

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Fog appears to be lifting

https://twitter.com/spaceflightnow/status/1229394662525370368

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Welcome to a fog shrouded Cape Canaveral, where SpaceX is readying a Falcon 9 to launch 60 Starlink broadband satellites: spaceflightnow.com/2020/02/17/fal…
« Last Edit: 02/17/2020 12:27 pm by FutureSpaceTourist »

Online FutureSpaceTourist

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https://twitter.com/spacexfleet/status/1229400958146355200

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Tracking indicates that tug Hawk released OCISLY from her tow at about 6:30am EST this morning.

The vessel is now standing at a safe distance to observe the operation.

Offline Steven Pietrobon

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T-38 minutes. The SpaceX Launch Director should be verifying go for propellant load about now.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Chris Bergin

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Offline Steven Pietrobon

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T-35 minutes. First and second stage RP-1 and first stage LOX loading should be starting about now.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online FutureSpaceTourist

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https://twitter.com/emrekelly/status/1229412350672998402

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SpaceX is GO to start fueling #Falcon9 ahead of 1005 ET liftoff from Launch Complex 40.
« Last Edit: 02/17/2020 01:32 pm by FutureSpaceTourist »

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