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NASA (mander.xyz)
submitted 6 months ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
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[-] zaphod@sopuli.xyz 41 points 6 months ago

400km is nothing, if you have/had satellite TV the signal comes from a geostationary orbit (35 786 km) and it has to get there first and if you're not exactly below the satellite it's even farther away. Streams from the ISS having low quality (do they actually have low quality?) is due to either bad cameras or cameras aging faster in space due to high energy particles hitting it.

[-] BluesF@lemmy.world 25 points 6 months ago

The ISS also moves relative to the receiver, whereas geostationary satellites don't.

[-] xor@lemmy.blahaj.zone 11 points 6 months ago

I feel like "moves relative" also understates just how fast it moves: ~19,000mph

[-] zaphod@sopuli.xyz 7 points 6 months ago

It's a trade-off, either you have to do tracking and compensate for doppler shift or you have to deal with really bad SNR.

this post was submitted on 17 Apr 2024
1103 points (98.8% liked)

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