Wow, 250dB path loss for EME is wild! If the noise floor is at -170dBm, a I suppose a 1kW=60dBm transmitter and a 10dBi tx antenna + 10dBi rx antenna would barely make the link budget pencil out, right at the edge of what's possible. Cool! What kind of process gain is typical in modern protocols?
EME has (for now ...) more or less moved entirely into the amateur realm, so the "modern" digital protocol is mostly JT65, which has 10-15 dB of processing gain over CW.
27:30 It isn't the Earth's "rotational velocity" that results in more meteors in the morning, it is the Earth's 30 km/s orbital velocity around the Sun. The Earth is plowing through space on the morning terminator side like a car windshield plowing through bugs.
EME. Wow. Could this be the source of space music?! I jest of course but makes you think what we as humans have thrown out into space. All those broadcasts in not just VHF but all frequencies emitted since the beginning of radio. It would be weird if one day in the future, where we have even more sensitive equipment than now, to pick up spark gap radio signals from say the RMS Titanic or Moon landing "data", that bounced off of celestial bodies. Talk about time travelling. Its not out of the realm of possibility to stumble across "time capsules". We have questionable asteroids that have turned out to be space junk such as the S-IVB stage of Apollo 12. The LEM of Apollo 10 a.k.a. Snoopy is still out there somewhere as well.
These videos are really helping me for my radio amateur license exam! Thx!!
Thanks and good luck! 73 DE KO4LZ
That is a True 5 stars ratin video ! Absolutely perfect !
Thank you!
Another fantastic video! You had me watching the whole way though. Listening to the Soviets off the moon ... thats insane!
Wow, very comprehensive overview! Thank you.
Thank you!
Thanks for this awesome video, really helping me study for a ham exam!
These presentations are excellent - thank you.
So this is how the Sputnik satellite was used to measure some properties of the ionosphere
Wow, 250dB path loss for EME is wild! If the noise floor is at -170dBm, a I suppose a 1kW=60dBm transmitter and a 10dBi tx antenna + 10dBi rx antenna would barely make the link budget pencil out, right at the edge of what's possible. Cool! What kind of process gain is typical in modern protocols?
EME has (for now ...) more or less moved entirely into the amateur realm, so the "modern" digital protocol is mostly JT65, which has 10-15 dB of processing gain over CW.
I would like this, but there are already 73 likes!
Please don't let that stop you :) Thanks for the comment!
27:30 It isn't the Earth's "rotational velocity" that results in more meteors in the morning, it is the Earth's 30 km/s orbital velocity around the Sun. The Earth is plowing through space on the morning terminator side like a car windshield plowing through bugs.
EME. Wow. Could this be the source of space music?! I jest of course but makes you think what we as humans have thrown out into space. All those broadcasts in not just VHF but all frequencies emitted since the beginning of radio. It would be weird if one day in the future, where we have even more sensitive equipment than now, to pick up spark gap radio signals from say the RMS Titanic or Moon landing "data", that bounced off of celestial bodies. Talk about time travelling. Its not out of the realm of possibility to stumble across "time capsules". We have questionable asteroids that have turned out to be space junk such as the S-IVB stage of Apollo 12. The LEM of Apollo 10 a.k.a. Snoopy is still out there somewhere as well.
I suppose instead of "aircraft scatter" one could also have a "spacecraft / space junk scatter" mode :)
O'Kon Prairie
360p Team !! :D
Video is available up to full HD (1080p) :)