this post was submitted on 13 Mar 2025
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Science Memes

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[–] Yorick@sh.itjust.works 103 points 1 day ago (4 children)

The magic of a clear line of sight and vacuum for a good ~384'300km!

So should we do low power communications by using the moon as reflector dish?

[–] slazer2au@lemmy.world 73 points 1 day ago (1 children)

Also, directional vs omnidirectional antennas.

[–] facepainter@lemm.ee 43 points 1 day ago (1 children)

This is the most important part.

[–] deadbeef79000@lemmy.nz 19 points 1 day ago (1 children)

And not encoding any data. Well a laser pulse is kind of datum.

[–] meyotch@slrpnk.net 17 points 1 day ago

One bit! That’s all you get!

[–] Hugin@lemmy.world 37 points 1 day ago (1 children)

There was a NSA program that listened to soviet messages by collecting the transmissions that bounced off the moon.

[–] DaveyRocket@lemmy.world 2 points 33 minutes ago* (last edited 32 minutes ago)

I gotta say, the moon’s really starting to sound like a fucking snitch.

[–] PhobosAnomaly@feddit.uk 26 points 1 day ago

Two thirds of a million kilometres under good conditions and at a precise angle to get a picture of goatse moontooth'd to my phone

Welcome to 2025!

[–] mexicancartel@lemmy.dbzer0.com 21 points 1 day ago* (last edited 1 day ago) (1 children)

I am worried about 2000ms ping

[–] Rhaedas@fedia.io 6 points 1 day ago

That's what the anti-tachyon modulation circuit is for, to change the time phase and remove most of that lag. Once they're in sync, it's literally real time!

the distance is 384400km

That's almost the distance between my bed and the kitchen before my first cup of coffee!

[–] neatobuilds@lemmy.today 13 points 1 day ago (1 children)

I use about 800mW for my fpv drone and if you get a little bit away from yourself and go behind a tree or something you could lose video pretty easily

[–] recklessengagement@lemmy.world 3 points 1 day ago (1 children)

Wonder what the latency would be like trying to fly my 3.5" on the moon from earth

Although I suppose the lack of atmosphere would be the bigger issue...

[–] Morphit@feddit.uk 2 points 23 hours ago

Think of the speeds you could fly at with no drag! I'm so bummed that the Grace Hopper drone didn't get to fly after Intuitive Machines fluffed their second landing. That would have been awesome outreach from NASA.

We want drones on the moon!

[–] zaphod@sopuli.xyz 26 points 1 day ago (3 children)

It's easy, you just need a big antenna, low noise receiver (just cool it) for low bandwidth (keeps noise power low) and no interferers in the same frequency band.

[–] Trollception@sh.itjust.works 1 points 2 hours ago

Perfect. Now put those on cell phones and make it fit in your pocket.

[–] Zwiebel@feddit.org 9 points 1 day ago (1 children)
[–] zaphod@sopuli.xyz 2 points 23 hours ago (2 children)

Show me a non-directional antenna.

[–] Lv_InSaNe_vL@lemmy.world 1 points 50 minutes ago

Omni-directional antennas?

[–] ChairmanMeow@programming.dev 1 points 1 hour ago (1 children)
[–] zaphod@sopuli.xyz 1 points 1 hour ago

Just because you call it non-directional doesn't mean it is. They all have gain compared to a theoretical isotropic antenna.

[–] wander1236@sh.itjust.works 9 points 1 day ago (1 children)
[–] WhatAmLemmy@lemmy.world 5 points 1 day ago

It's almost too easy

[–] lnxtx 14 points 1 day ago (1 children)

My Bluetooth buds often get interference - technically 100 mW, distance from my head to a pocket.

[–] moody@lemmings.world 8 points 1 day ago

technically 100 mW

Technically a maximum of 100 mW, but realistically much lower than that.

[–] yesman@lemmy.world 6 points 1 day ago (1 children)

To be fair, that's an insignificant distance for light to travel.

[–] 7eter@feddit.org 7 points 1 day ago (1 children)

Still takes at least 2 seconds for the round trip.

[–] yesman@lemmy.world 6 points 1 day ago (1 children)

Well, according to my ex, even 30 or 90 seconds is an interval unworthy of consideration.

[–] RubberElectrons@lemmy.world 3 points 23 hours ago* (last edited 23 hours ago) (1 children)