this post was submitted on 13 Mar 2025
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Science Memes

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[–] Yorick@sh.itjust.works 90 points 20 hours 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 67 points 19 hours ago (1 children)

Also, directional vs omnidirectional antennas.

[–] facepainter@lemm.ee 39 points 19 hours ago (1 children)

This is the most important part.

[–] deadbeef79000@lemmy.nz 18 points 19 hours ago (1 children)

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

[–] meyotch@slrpnk.net 15 points 18 hours ago

One bit! That’s all you get!

[–] Hugin@lemmy.world 34 points 18 hours ago

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

[–] PhobosAnomaly@feddit.uk 24 points 20 hours 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 19 points 19 hours ago* (last edited 19 hours ago) (1 children)

I am worried about 2000ms ping

[–] Rhaedas@fedia.io 5 points 15 hours 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!

[–] Viking_Hippie@lemmy.dbzer0.com 23 points 16 hours ago

the distance is 384400km

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

[–] neatobuilds@lemmy.today 10 points 16 hours 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 15 hours 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 14 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 23 points 19 hours ago (2 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.

[–] Zwiebel@feddit.org 8 points 17 hours ago (1 children)
[–] zaphod@sopuli.xyz 1 points 14 hours ago

Show me a non-directional antenna.

[–] wander1236@sh.itjust.works 8 points 19 hours ago (1 children)
[–] WhatAmLemmy@lemmy.world 5 points 17 hours ago

It's almost too easy

[–] lnxtx@feddit.nl 12 points 19 hours ago (1 children)

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

[–] moody@lemmings.world 7 points 15 hours ago

technically 100 mW

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

[–] yesman@lemmy.world 6 points 17 hours ago (1 children)

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

[–] 7eter@feddit.org 6 points 16 hours ago (1 children)

Still takes at least 2 seconds for the round trip.

[–] yesman@lemmy.world 6 points 16 hours ago (1 children)

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

[–] RubberElectrons@lemmy.world 3 points 14 hours ago* (last edited 14 hours ago) (1 children)