/sci/ - Science & Math

>SkySat is a constellation of sub-meter resolution Earth observation satellites owned by Planet Labs, providing imagery, high-definition video and analytics services.

Planet Labs payload info:
>https://www.planet.com/pulse/skysats-16-21-to-launch-on-spacex-falcon-9-starlink-missions/
>https://space.skyrocket.de/doc_sdat/skysat-3.htm
>https://spaceflightnow.com/2020/06/12/hitching-a-ride-with-spacex-planet-poised-to-complete-skysat-fleet/
>https://www.theverge.com/2020/6/9/21283736/planet-spacex-satellite-camera-falcon-rocket
>https://arstechnica.com/science/2020/06/planet-teams-with-spacex-to-expand-its-earth-observation-constellation/

>>11792562
>>11792563
cringe

COUNTDOWN
HR/MIN/SEC EVENT
00:38:00 SpaceX Launch Director verifies go for propellant load
00:35:00 RP-1 (rocket grade kerosene) loading underway
00:35:00 1st stage LOX (liquid oxygen) loading underway
00:16:00 2nd stage LOX loading underway
00:07:00 Falcon 9 begins engine chill prior to launch
00:01:00 Command flight computer to begin final prelaunch checks
00:01:00 Propellant tank pressurization to flight pressure begins
00:00:45 SpaceX Launch Director verifies go for launch
00:00:03 Engine controller commands engine ignition sequence to start
00:00:00 Falcon 9 liftoff

LAUNCH, LANDING AND DEPLOYMENT
HR/MIN/SEC EVENT
00:01:12 Max Q (moment of peak mechanical stress on the rocket)
00:02:32 1st stage main engine cutoff (MECO)
00:02:36 1st and 2nd stages separate
00:02:43 2nd stage engine starts
00:03:11 Fairing deployment
00:07:03 1st stage entry burn complete
00:08:42 1st stage landing
00:08:53 2nd stage engine cutoff (SECO-1)
00:12:34 SkySat-18 deployment
00:13:04 SkySat-17 deployment
00:13:34 SkySat-16 deployment
00:26:00 Starlink satellites deploy

This is the first SpaceX rideshare mission.

>SpaceX has worked with Planet to devise a means of attaching the Planet satellites on top of its stack of 60 Starlink satellites. These rideshare missions came together quickly, as Planet and SpaceX only signed an agreement about six months ago. "This is the result of SpaceX dramatically cutting the cost of access to launch," said Mike Safyan, vice president of launch at Planet. "It's significant. They cut the price so much we could not believe what we were looking at."

>"You typically end up with lower pricing on rideshare anyway," Safyan said. "With SpaceX being the lowest price option out there, they are the first port of call for us. There are lots of paths to orbit. We continue to engage with other launch providers, but we are always looking for the lowest cost and most reliable path to orbit."

(https://arstechnica.com/science/2020/06/planet-teams-with-spacex-to-expand-its-earth-observation-constellation/))

>Want to stay up and watch this
>also want to watch PC game show in like 9 hours
fuck

>>11792584
launch is in two hours, that leaves you like six and a half hours of sleep?

Bruh how am I supposed to stay awake for another 90 minutes fuck

>>11792604
Drugs are probably your best bet

69 minutes to stream start

What's the cost saving Planet Labs is getting with this? I heard it's more than 20 mil, anybody have a more accurate number?

>>11792584
>PC game show
whoa thanks for telling me about this, I didn't know it was still happening. How did you find out about it, may I ask?

I should go to bed

>>11792737
Pussy. PUSSY. What, you don't wanna see the big rocket launch?

20 mins

What the fuck another launch

No static fire on this one... I have a bad feeling about this bro’s.

aw shit boys here we go

WE LIVE

JESSIE

>tfw no spacex gf

Launch cat says launch!

SPACE SPACE SPACE SPACE!

ahhhhh im gonna coom

Space

CLOUDS

nice, we should get fairing recovery updates this time

Digits and it fails

>>11792796
>Boing! snipers resorting to numerical ouija to fight Elon

lmao

>>11792786
What did we tell you, anon?
Don't... be... weird.

EUROPE GANG OUUUH

T-30

>>11792792
Space!

LAUNCH

LIFTOFF

Yes!

THERE SHE BLOWS

liftoff!

anyone's got the website where you could see the position of the satellite fleet on the globe?

Ocho?

OOOOOOOOOOOOOOHHHHHHHHHHH

I'M QMING

MECO AND STAGE SEP AND SES

>>11792821
someone shop bejita into this

Grid fins deployed.

also fairing is deployed

so boring

what is interesting to watch about this? every launch is the exact same

Why does it look like there are bubbles coming off first stage??

Is that lightning?

>>11792829
It flew through a ton of clouds on the way up, so maybe water?

>>11792827
are those thunderstorms in the background?

>>11792786
SpaceX always have these good looking girls doing commentary.

>>11792829
engines have some gassing out - and there might be some ablation of the heatshiled at the bottom.

I do agree though, more visible now then earlier. might be the sun hitting it.

Nice green flash

ENTRY BURN

>>11792828
The launch and landings

Perfect

L A N D E D

Holy

>dawn landing

TOUCHDOWN!

Yay, the feed didn't cut out for this landing!

Yesss!!

What a nice view

Very nice.

>space is hard

>>11792818
https://findstarlink.com/

>>11792856
last one neither if I recall right

nice relaxing music

>>11792562
gg ez

>>11792872
SpaceX has great production values.

Skysats are away!

Space!

New Glenn flies on suicide watch

guys, why did they bring giant die with their satellites?

>>11792868
thanks!

>>11792885
saved lmao

Squidgirl is like a ready made starship chan.

>>11792891
clean it up janny

>>11792891
It was a rideshare since they had two fewer Starlink satellites than normal.

>>11792897
what

someone at spacex has a good taste in ambient music

>>11792910

this shit is making me real paranoid rn

>>11792911
Just now that you mentioned it, I had KSP VAB jazz playing in the background the entire time, just noticed that.

>>11792911
https://www.youtube.com/playlist?list=PL4AIG34oU42vN7V6uw1pLMEwNrcemqB58

>>11792891
for rolling

>>11792913
why am I not surprised that this exists?

>>11792911
Daft Punk needs to do a SpaceX Ambient Techno Albulm.

>>11792923
Dicey launch?

these smaller spacex streams are extremely comfy, when they don't do all that social media bs etc, just pure engineering

>>11792919
Nice, thanks for the link

Three birds confirmed.

>>11792924
good one, make a meme dot org

>>11792935
I miss the old technical streams without commentary.

>>11792946
Jesse is a qt and the production values on the regular streams are great, so I don't mind.

>>11792928
https://www.youtube.com/watch?v=yIyVEJd0fNc

autechre-amber, this is music for the spacetrip to mars

Music is disco af, ayys b like!

Deployment confirmed.

Successful launch and landing!
Next SpaceX launch is the 22nd or so, yet another Starlink batch. Will have launch thread up as normal.

Goodnight, anons

i wouldn't mind deploying my satellite in her orbit, if you know what i mean

>>11793022
'night anon

>>11793010
Yes
>>11793025
stop molesting miss July anon!

Space!

>>11792935
That's NASA, not SpaceX.

>108 posts
is this the smallest SpaceX launch thread ever? Sure is routine.

>>11793045
Space is getting routine, just a couple hours before this rocket lab launched too

>>11793056
Yep, here's a comparison because it just doesn't show in the videos^^

https://twitter.com/cangrejo210/status/1271747154743365633
This launch had the space squid twilight effect, some cool pics on the ground of it

>>11793060
There is still a market for the electron though, orbits that wouldn't be possible to rideshare from other providers.
At least until the cost of rideshare+orbital corrections goes below the cost of the electron launch

Interesting tidbit, this was the first time they didn’t static fire at the pad with the first stage. Make sense since the rocket has already flown two times and it’s mostly and internal payload

>>11793025
>Choice a dark skin women of a blonde princess
KYS

>>11793083
I wonder how much they save not doing those, can't be that expensive compared to the vehicle+payload? Even if it's just internal, the economics of not doing static fire doesn't seem to make sense

>>11793096
I mean it’s already proven itself by launching and landing multiple times. They have enough sensors and ground inspections to catch everything I’d imagine. Hell I can’t even recall a time when the static fire has found a problem (besides AMOS-6...). It’s just another launch prep step they decided to axe. Even $200,000 in savings adds up over time; it’s also less wear and tear / cycles put on the GSE and stage

>>11793060
Falcon 9's price per kilogram is not quite that good. They've only demonstrated up to 15,600 kilograms with booster reuse, and the 22,800 kilogram throw weight is the limit when they expend the vehicle, which is not a service SpaceX offers for $62 million. Using the more modest 15,600 kilogram feature, Falcon 9 comes down to a bit under $4000 per kilogram.

>>11793101
Plus they basically never fly at full capacity. Nor do most rockets. I never really liked $/kg for that reason. A better metric is an all-encompassing something which would account for orbit variety, payload, cadence, cost, payload comparability (stresses and vibrations on launch or whatever) lots of stuff.

>>11793102
Starlink is basically at full capacity, to be fair.

>>11793108
Yeah. Which is a bit of a shame, we would have had a lot of land landings rather than droneship if they just took a few satellites off of the stack. I miss the car alarm setting off sonic booms at the cape (well videos of them)

>>11793111
Don't you worry, Starship should provide sonic booms in spades, both from the boosters and from the ships.

>>11793094
i like jessie more than the blonde 2bh

NSF could see the entry burn from the shore, 600km away https://youtu.be/2hoH_ysYIF4 at 54:

>>11792792
For future reference, that's a starfleet EVA uniform as seen in The Undiscovered Country, aka the best trek film behind Wrath of Khan.

>>11793199
>Wrath of Khan.
Ricardo Montalbán and William Shatner never spent a day of filming together, and it was the best thing to happen to that movie.

>>11793208
After thinking for a couple seconds, that's absolutely true. They never share a scene, and act to a camera lens or radio handset in all of their "interactions."

>>11793102
>stresses
I wonder what is the most “stable” launcher, ie. lowest g loading. I guess you could tweak the trajectory, though.

Man, Spacex making these launches so common now with Starlink

>>11793407
12000 units man. 12000 in 60 per flight with a lifetime of 5 years before self de-orbiting.

>>11793273
I think all the human launchers (Soyuz, Falcon, Saturn, Shuttle) had milder acceleration than standard launchers.

But in terms of vibration, the Electron is the mildest, due to its use of electric pumps. This allows satellite makers to save weight because they don't have to make them so mechanically robust in all axes, just the launch direction.

>>11793618
I believe Musk said they will make the 2nd generation last longer than 5 years

>>11793060
How can black bois even compete?

>>11793775
Okay, that's interesting to know. I calculated that one of these cube sats costs approximately 700k to be up there and I was very relieved to find out that it seems like SpaceX isn't ignoring the problem of space junk. It's only 12000 objects, but still, at some point that all ads up and the idea of being locked in on this planet honestly makes me claustrophobic even considering that mankind never was closer to permanently leave Earth.