I recently touched on the Q/V backhaul (v-band feeder link below) in two posts, as the onboard antenna for this link was disclosed in the recent video. This writeup will take a closer look into one aspect of that link. Attenuation.
DISCLAIMER NOTE: I am NOT an RF engineer. What I write here is just to the best of my understanding of the matter. I would very much appreciate people that work with these things to contribute with their thoughts. And please correct me if I got anything of this wrong.
Attenuation means the gradual loss of intensity through a medium.
It is a very common bear case to come across that the fairly new concept AST SpaceMobile uses of extremely high throughput Q/V-band links in the backhaul is:
"Impossible at that distance because of high attenuation in Q/V band."
Impossible. Strong word, and always delivered with no data to back that up.
Let's hear Wernher on that:
A few words from the father of the US Space program.
>“I have learned to use the word 'impossible' with the greatest caution.”
>
>Wernher Magnus Maximilian, Freiherr von Braun
Fun fact. The main purpose of Bluewalker3 in space tests are to test the backhaul link and integration to terrestrial networks, the left part of the image above. Fronthaul, the right part, is very much tested and set already, just in the other direction using Bluewalker1&2.
Why Q/V band? The good.
Spectrum is scarce and these higher band have not been put to extensive use, yet, and because of this broad bandwidths can be found and put to use. A broad band is what makes high throughput possible.
Attenuation in Q/V - band. The bad, but not that bad imo.
Attenuation. I added approximate numbers for cellular 2 GHz bands and the relevant Q/V-bands.
Recap, attenuation is: **the gradual loss
... keep reading on reddit ➡I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.
Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.
Do your worst!
I'm surprised it hasn't decade.
For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.
I said "hey look, an escaPEA"
No one near me but it didn't half make me laugh for a good hour or so!
Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂
It really does, I swear!
They were cooked in Greece.
Because she wanted to see the task manager.
Heard they've been doing some shady business.
but then I remembered it was ground this morning.
Edit: Thank you guys for the awards, they're much nicer than the cardboard sleeve I've been using and reassures me that my jokes aren't stale
Edit 2: I have already been made aware that Men In Black 3 has told a version of this joke before. If the joke is not new to you, please enjoy any of the single origin puns in the comments
They’re on standbi
A play on words.
Pilot on me!!
Nothing, he was gladiator.
Or would that be too forward thinking?
Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.
This sub is mostly just NSFW puns now.
If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.
Edit* I'm not replying any longer and turning off notifications but to all those that say "no one cares", there sure are a lot of you arguing about it. Maybe I'm wrong but you people don't need to be rude about it. If you really don't care, don't comment.
What did 0 say to 8 ?
" Nice Belt "
So What did 3 say to 8 ?
" Hey, you two stop making out "
When I got home, they were still there.
I won't be doing that today!
Where ever you left it 🤷♀️🤭
This morning, my 4 year old daughter.
Daughter: I'm hungry
Me: nerves building, smile widening
Me: Hi hungry, I'm dad.
She had no idea what was going on but I finally did it.
Thank you all for listening.
[Removed]
There hasn't been a post all year!
You take away their little brooms
It was about a weak back.
It’s pronounced “Noel.”
Dear Emily, I didn't want to frighten you with this letter. I promised Mr Dyer not to tell anyone, but I just can't take it anymore. Going there was a mistake. The voice...it won't stop screaming. Professor Armitage thinks I'm mad, but I know it’s not true! I have seen it with my own eyes! The horrors which those mountains hide. He already sent a request to be sent into a mental health institution. I don't want to go there, I can't. I needed to break my promise, and tell someone, anyone, what truly happened during the Miskatonic expedition of 20 December 1930.
We took off at 22:30, together with Dylan, Professor Walker, two men to help carry the fossils safely, William Duncan, our pilot and the supply necessary to transport the fossils and furnish the planes, enough food for three weeks, three sleds with six dogs each, and a few guns, in case anything bad happened. It was 2:38, around 4 hours since we have taken off, when the weather started to deteriorate.
At first there were minor turbulences. Most of us were calm, since it was nothing out of the usual, but William was worried, claiming that something way more menacing was approaching us. Then, sure as hell, it started getting worse. A blizzard hit us, causing massive damage to the engine, freezing one wing, and slowing down the propellers. The plane started loosing more and more altitude, obligating William to perform a forced landing around 5 kilometers away from Dyer’s camp.
During the landing, one of the wheels got stuck, causing the plane to drift on the slippery ice, ramming head first into a mountain, injuring the quarters and covering the wings in snow.
Thankfully, we crashed at a relatively low speed, so the damage was mostly mendable, and none of the crew was wounded. However, Dylan was in complete shock, shaking and crying the whole time. Hopefully, some rudimentary tools might have been competent to fix it. Unfortunately, we weren't able to find some in the luggage compartment, nor the cockpit.
Mr Walker strived to contact Dyer or Lake’s camp on the radio, but to no ensue. With the wind growing stronger and stronger, and the temperature below -50 degrees Celsius, we were left with no option but to venture into the Antarctic night in hopes of finding Dyer’s camp and bringing the necessary equipment to repair the plane.
Unfortunately, during the landing, one of the sleds broke, and the two remaining couldn't hold us all, so some had to remain overnight and watch over the plane. A ri
... keep reading on reddit ➡
