The original RaspPi probably has just enough CPU horsepower to demodulate the signal and compose the appropriate replies in order to use the onboard BBS in real time. The RaspPi3 has a better chance of working. I haven't tried it yet, but it's on the bottom of the "to do" list.
The original RaspPi certainly has enough horsepower to record the signal during the pass (say, to an attached USB thumb drive), and then after the pass it can demodulate the 9600 baud data stream out of the recording. This is fine if all you wanted was the telemetry, since the telemetry isn't time sensitive. Be aware that SDR recordings tend to be huge.
If you wanted to use the satellite as a digipeater for a scheduled digital QSO, then you could have all your messages prepared ahead of time and just send the appropriate message at the appropriate time (that is, right after you see the digipeated packets from the other station) in order to complete the QSO.
Hardware TNCs, or software modems taking the signal from a soundcard from the radio's discriminator (NOT from the speaker) or software modems getting a signal from software defined radio (a $15 RTLSDR USB dongle for example) -- any will work for the satellite's 9600 baud signal.
The satellite transmits what amateurs consider a "standard" 9600 baud packet radio signal -- G3RUH modulation, 9600 bits per second, bit scrambled, NRZI, HDLC with zero bit stuffing, AX.25 packets.
Although not directly a part of the above study, the paper includes this interesting tidbit:
"Even naive laboratory rats that have not been in contact with cats for several hundred generations still show strong aversive reactions when confronted with cat odor."
So you say you have this technology that creates words that people never actually said. But it sounds just like their voice. Clearly this is how Skynet begins!
Sarah: "No, I can't tell you where I am mom. I was told not to say." Mom: "Oh, but honey, I need to know where I can reach you. You tell me to hide out here in the cabin like some kind of fugitive and you won't tell me what's going on? I am worried sick dear." Sarah: "Ok. Here's the number...." Mom: "Ok. Go ahead.... Uh-huh. I've got it." Sarah: "I love you mom." Mom: "I love you too sweetheart."
And, this is just early days. Real terminators don't need to hear twenty minutes worth of a voice to duplicate it. Do you really think he sat down and spoke to Sarah's mom for twenty minutes?
Ok, here's some practical advice: (1) Always ALWAYS lock your dorm door, never leave it unlocked - not even for a minute. This includes going to the bathroom/shower. (2) Never leave your dorm room without your dorm keys, not even for a minute. (Remember, you locked it!) This includes going to the bathroom/shower. (3) Wake up early. There's only so much hot water in the hot water heater. (4) Make mistakes, but always make *NEW* mistakes. Part of college is learning, and that includes learning from your mistakes. You are allowed to make *some* mistakes, and expected to make others. Just make *NEW* mistakes. (5) Don't get any credit cards. You will get lots of great offers. Rip them up and throw them out. Now. (6) Make backups of your important stuff. Keep them someplace safe that is *NOT* in your dorm room/building (encrypt the backups and postal mail them back home if you have to). Think: they stole *everything* in my room.
If you can put in eight hours of classes and studying a day, every weekday, then you should be able to come out with a near 4.0 average. This sounds lame and it sounds like lots of work, and it is at lot of work. But the truth is, when you graduate your employer will expect you to put in AT LEAST eight hours a day every weekday. Start now.
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The original RaspPi probably has just enough CPU horsepower to demodulate the signal and compose the appropriate replies in order to use the onboard BBS in real time. The RaspPi3 has a better chance of working. I haven't tried it yet, but it's on the bottom of the "to do" list.
The original RaspPi certainly has enough horsepower to record the signal during the pass (say, to an attached USB thumb drive), and then after the pass it can demodulate the 9600 baud data stream out of the recording. This is fine if all you wanted was the telemetry, since the telemetry isn't time sensitive. Be aware that SDR recordings tend to be huge.
If you wanted to use the satellite as a digipeater for a scheduled digital QSO, then you could have all your messages prepared ahead of time and just send the appropriate message at the appropriate time (that is, right after you see the digipeated packets from the other station) in order to complete the QSO.
See you on the birds!
DeQueue
HI Bruce
Hardware TNCs, or software modems taking the signal from a soundcard from the radio's discriminator (NOT from the speaker) or software modems getting a signal from software defined radio (a $15 RTLSDR USB dongle for example) -- any will work for the satellite's 9600 baud signal.
The satellite transmits what amateurs consider a "standard" 9600 baud packet radio signal -- G3RUH modulation, 9600 bits per second, bit scrambled, NRZI, HDLC with zero bit stuffing, AX.25 packets.
Dequeue
For more details, see "Fatal attraction in rats infected with Toxoplasma gondii."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1690701/pdf/11007336.pdf
Although not directly a part of the above study, the paper includes this
interesting tidbit:
"Even naive laboratory rats that have not been in contact
with cats for several hundred generations still show
strong aversive reactions when confronted with cat odor."
So you say you have this technology that creates words that people never actually said.
But it sounds just like their voice.
Clearly this is how Skynet begins!
Sarah: "No, I can't tell you where I am mom. I was told not to say."
Mom: "Oh, but honey, I need to know where I can reach you. You tell me to hide out here in the cabin like some kind of fugitive and you won't tell me what's going on? I am worried sick dear."
Sarah: "Ok. Here's the number...."
Mom: "Ok. Go ahead.... Uh-huh. I've got it."
Sarah: "I love you mom."
Mom: "I love you too sweetheart."
And, this is just early days. Real terminators don't need to hear twenty minutes worth of a voice to duplicate it. Do you really think he sat down and spoke to Sarah's mom for twenty minutes?
Because of the break-ins, systems had to be rebuilt and scientists and engineers had to manually communicate with spacecraft...
.sig here"
Did they use an a hitchhiker style Sub-Etha Sens-O-Matic electronic thumb or just a towel?
Dequeue
"Insert witty
Ah, my young padawan. This will be the one ring that brings balance to the light side and the dark side.
Ok, here's some practical advice:
(1) Always ALWAYS lock your dorm door, never leave it unlocked - not even for
a minute. This includes going to the bathroom/shower.
(2) Never leave your dorm room without your dorm keys, not even for a minute.
(Remember, you locked it!) This includes going to the bathroom/shower.
(3) Wake up early. There's only so much hot water in the hot water heater.
(4) Make mistakes, but always make *NEW* mistakes. Part of college is learning,
and that includes learning from your mistakes. You are allowed to make *some*
mistakes, and expected to make others. Just make *NEW* mistakes.
(5) Don't get any credit cards. You will get lots of great offers.
Rip them up and throw them out. Now.
(6) Make backups of your important stuff. Keep them someplace safe that is
*NOT* in your dorm room/building (encrypt the backups and postal mail them
back home if you have to). Think: they stole *everything* in my room.
If you can put in eight hours of classes and studying a day, every weekday,
then you should be able to come out with a near 4.0 average. This sounds
lame and it sounds like lots of work, and it is at lot of work. But the
truth is, when you graduate your employer will expect you to put in AT LEAST
eight hours a day every weekday. Start now.
Dequeue