Author Topic: SpaceX Falcon 9 : JCSAT-18/Kacific-1 : December 16/17, 2019 - DISCUSSION (Read 49844 times)

Alexphysics · « **Reply #40 on:** 12/06/2019 10:21 pm »

Quote from: jjyach on 12/06/2019 07:54 pm

Quote from: zubenelgenubi on 12/06/2019 07:46 pm
Now this is the next launch, in 9 days, from KSC/CC, from LC-39A.

When will SpaceX suspend Starship pad work in favor of this launch campaign? It would have to be suspended for the static fire as well?

Are there any outstanding issues regarding 39A, or is it ready to go?

It's going from LC-40, not 39A

And what's more, the TE is currently in Crew Dragon configuration and not in fairing configuration

Draggendrop · « **Reply #41 on:** 12/07/2019 01:20 am »

question...

Is there much of a change to the TE for LC-40 ...when going from cargo launch to a launch involving a fairing?

Draggendrop · « **Reply #42 on:** 12/07/2019 01:50 am »

wrt TE config...CRS to fairing

CRS-17, May 4, 2019

https://forum.nasaspaceflight.com/index.php?topic=48028.80

https://twitter.com/spacex/status/1124095620174757889

----------------------

Starlink V0.9, 23 May, 2019

https://forum.nasaspaceflight.com/index.php?topic=48135.80

https://twitter.com/SpaceX/status/1131630619195191296

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Draggendrop · « **Reply #43 on:** 12/07/2019 05:52 pm »

I may have answered my own question...

wrt TE config...CRS to fairing

CRS-17, May 4, 2019
Starlink V0.9, 16 May, 2019 scrub, upper level winds23
Starlink V0.9, 23 May, 2019 launch

The LC-40 pad crew demonstrated a 12 day reconfig...CRS to fairing.

Here, we have CRS-19 launched on 5th of December with JCSAT-18 NET of December 15/16, 2019.
This would appear reasonable, even without a slip to the right.

Just a WAG, but it appears that the customer TE config changes are umbilicals with TE/pad box hookups and AC hoses. The major time constraints would be for post launch TE/pad repairs, consumables replentishment, pad testing, software, permits and launcher logistics/assembly and testing. The TE config either way is very minor in the grand playbook of events at LC-40.

note...I do not know the proper name for the TE upper sling arms or its actual purpose. I had assumed that it was a recoil mechanism for the fairing hoses and doubled as a fairing support strap when the TE is horizontal. The yellow "strap" has been removed for most CRS missions at LC-40. Pad KSC 39A has a similar sling arm for "fairing" launch but has it removed for CRS and Commercial Crew.
--------------------------------
LC-40

Vertical...prelaunch/launch "fairing"
-Customer electrical ground support equipment (EGSE) thru S2 catenary umbilical (via pad box).
-Payload environmental control attachment/pad selectable AC to fairing hoses.
-Fairing structural support ? (sling arm open with strap, stage 2 strongback "arms" closed, TE interstage support static)

Vertical...prelaunch/launch "CRS"
-Customer EGSE via Dragon umbilicals.
-Capsule environmental control via Dragon umbilicals.
-Capsule structural support ? (sling arm open with strap removed, stage 2 strongback "arms" closed, TE interstage support static)
---------------------------------
LC-40

Horizontal processing/hanger/rollout "fairing"
-Customer EGSE via processing/hanger box to payload adapter interface/catenary umbilical.
-Payload environmental control attachment via processing/hanger HVAC/pad selectable AC to fairing hoses.
-Fairing structural support ? (sling arm closed with strap, stage 2 strongback "arms" open, TE interstage support under load)

Horizontal processing/hanger/rollout "CRS"
-Customer EGSE via processing/hanger box to payload adapter interface/catenary/Dragon umbilicals during progression.
-Capsule environmental control via processing/hanger hookups and Dragon umbilicals
-Capsule structural support ? (sling arm open with strap removed, stage 2 strongback "arms" open, TE interstage support under load)
----------------------------------

I may have messed up a few details and used improper naming conventions. After all this, I am sure that a customer TE reconfig either way is a minor event at LC-40 and if we remove FH from the discussion, the same holds true for 39A.

FutureSpaceTourist · « **Reply #44 on:** 12/10/2019 09:17 pm »

https://twitter.com/emrekelly/status/1204524881188179968

Quote

Yup, next week's gonna be busy. #SpaceX targeting NET Monday, Dec. 16, for #Falcon9 launch from Cape Canaveral AFS with JCSAT-18 / Kacific-1. Launch hazard area in effect from 1700 to 2130 ET (2200 to 0230 UTC). Drone ship.

gongora · « **Reply #45 on:** 12/11/2019 08:00 pm »

[Space News] Kacific, with SpaceX launch imminent, borrows $160 million for satellite refinancing

Quote

Kacific said it recently secured $160 million from the Philippines-based Asian Development Bank and GuarantCo, a European- and Australian-government backed infrastructure investment organization, along with other financiers.

The $160 million enables Kacific to repay the short-term loans it obtained while Ex-Im Bank’s lending window was effectively closed to satellite deals, the company said.

scr00chy · « **Reply #46 on:** 12/12/2019 07:56 pm »

https://twitter.com/kacific/status/1205198102635909121

Quote

Kacific1 is now fully encapsulated and waiting for assembly with Falcon 9. #Kacific1 #TheHeartofBroadband

Elthiryel · « **Reply #47 on:** 12/12/2019 11:56 pm »

If the launch is not delayed (and I didn't miss something), it should be the shortest turnaround at a single pad for SpaceX.

11 days, 6 hours, 40 minutes, 36 seconds if they launch when the window opens.

12 days, 1 hour, 21 minutes, 4 seconds is the current record as far as I know (CRS-18 -> AMOS-17).

FutureSpaceTourist · « **Reply #48 on:** 12/13/2019 06:36 am »

https://twitter.com/julia_bergeron/status/1205352260978511872

Quote

Current positions of Tug Hawk/OCISLY and GO Quest. The winds were a bit gnarly at 20 kn closer to shore. It is a little calmer at their current location with 12 kn. Quest has almost caught up to Hawk who is starting to stabilize at 5 kn/hr. #SpaceXFleet #JCSAT

https://twitter.com/julia_bergeron/status/1205322860501372929

Quote

It appears GO Quest is following in the wake of Tug Hawk and OCISLY. The #JCSAT mission has begun. Fair winds and following seas. Be safe out there! #SpaceXFleet

Draggendrop · « **Reply #49 on:** 12/15/2019 11:38 am »

Quote from: Elthiryel on 12/12/2019 11:56 pm

If the launch is not delayed (and I didn't miss something), it should be the shortest turnaround at a single pad for SpaceX.

11 days, 6 hours, 40 minutes, 36 seconds if they launch when the window opens.

12 days, 1 hour, 21 minutes, 4 seconds is the current record as far as I know (CRS-18 -> AMOS-17).

Not that it really matters, but I beleive your post was wrt launch to launch pad turnarounds. One should consider launch to scrub (non pad related) as well...

an example...
CRS-17, May 4th, 2019 launch at 2:48 am EST
Starlink V0.9 May 15th, 2019 scrub at 10:30pm EST due to upper level winds...pad was ready.
This one was 11 days, 19 3/4 hrs...
May be an idea to refilter data with new qualifiers...

ZachS09 · « **Reply #50 on:** 12/15/2019 06:56 pm »

Is it normal for a satellite’s mass number to change as launch day approaches?

JCSat 18/Kacific 1 went from 6,800 kg to 6,956 kg a couple days ago.

https://spaceflightnow.com/2019/12/13/spacex-performs-hold-down-firing-for-heavyweight-satellite-launch-monday/

gongora · « **Reply #51 on:** 12/15/2019 07:00 pm »

6800 was just an estimate.

FutureSpaceTourist · « **Reply #52 on:** 12/15/2019 09:36 pm »

Quote from: RocketLover0119 on 12/15/2019 07:36 pm

Webcast up on YouTube, haven't changed the webcast page yet on their site.

This is a good spot:

https://twitter.com/spacexfleet/status/1206341341258682368

Quote

SpaceX has updated its Mars terraforming render - as seen on the webcast splashscreen of tomorrow's JCSAT-18 mission.

Anything to do with a preferred Mars landing site for SpaceX?

FutureSpaceTourist · « **Reply #53 on:** 12/16/2019 06:30 am »

Tim Dodd is doing his own livestream of the launch

Steven Pietrobon · « **Reply #54 on:** 12/16/2019 08:53 am »

Quote from: FutureSpaceTourist on 12/16/2019 06:07 am

Launch patch from the press kit

Looks like Tasmania has disappeared! The rest of Australia is also done very poorly.

LouScheffer · « **Reply #55 on:** 12/16/2019 02:14 pm »

A fit to previous missions would suggest about a 2151 m/s deficit to GTO for a mass of 6956 kg.

Previous high mass missions with recovery have used about a 27 degree transfer orbit. This takes about 1802 m/s to circularize and remove inclination with an apogee burn. So if the total deficit is 2151 m/s, then the satellite should use 349 m/s to increase apogee, then circularize.

At 27 degrees, starting from a 230 km circular orbit, it takes 2448 m/s to reach a GEO apogee. If the satellite is 349 m/s short, as we estimate, then it will achieve a dV of 2097 at cutoff, resulting in a apogee of 21,100 km.

So overall, I predict a resulting orbit of 230 km x 21,100 km x 27^o.

Note that up through the last recovered GTO launch, Nusantara Satu, SpaceX has been slightly tweaking upward the speed at stage separation, as they experiment with how little fuel they can reserve for landing. If this trend continues, performance might be slightly better than predicted from the Nusantara Satu mission.

Chris Bergin · « **Reply #56 on:** 12/16/2019 06:25 pm »

LIVE - From SLC-40 - Join Chris Gebhardt (@ChrisG_NSF) and the NSF Team setting up their remote cameras ahead of SpaceX's Falcon 9 launch with JCSAT-18/Kacific1:

Chris Bergin · « **Reply #57 on:** 12/16/2019 10:05 pm »

Live, from the launch site in person, join Chris G and Das:

MATTBLAK · « **Reply #58 on:** 12/16/2019 11:09 pm »

The NSF live stream guys says to ask questions in the chat section: but that's nearly impossible because of the imbeciles spamming that section!!

PreferToLurk · « **Reply #59 on:** 12/16/2019 11:22 pm »

Is it just me, or did it look like the core almost took back off from OCISLY? Maybe it was just an optical illusion from all the shadows, but I swear it looked like engine cutoff was a little late.

Congrats regardless on the bulls eye landing, optical illusion or no.