DaveInDenver
Rising Sun Ham Guru
https://amsat-uk.org/2020/09/02/iss-fm-repeater-activated/
The cross band repeater on the space station is now operational.
The cross band repeater on the space station is now operational.
So I am reading quite a bit about APRS and just got done reading an interesting blog, by a man named Blargh from April 20, 2020. He states " you can bounce messages off of the ISS. It has a digipeater. It’s not on the standard APRS frequency, but on 145.825 MHz. This way you can reach really far in one hop."https://amsat-uk.org/2020/09/02/iss-fm-repeater-activated/
The cross band repeater on the space station is now operational.
We don't really have an APRS 101 thread, although Marco and TJ started threads that kind of serve as that.Sounds like you can setup a ADHOC network using ISS. I wonder how much bandwidth that ISS can receive and transmit. If it can do enough maybe you can establish the network somewhere on earth instead of the ISS. Either way I find this interesting.
APRS is NOT Ham Radio's MOBILE COMPUTING:
The 1200 baud national APRS user channel cannot and was never intended to be Ham Radio's solution to Mobile Computing. The thousand-fold greater bandwidths required for typical Mobile Computing applications are enormous and there is no attempt to clutter the APRS channel with all possible data that might be of use to a user with a laptop in his car. APRS is for brief, short data types of immediate Ham Radio interest to all tactical users on the local RF channel.
While it is not a mobile computing solution, one can't help but see that the fact you can send email, receive messages, transmit pictures, compress date, uncompress data, and so on and on and on... is kind of self defeating as I know people that have really gotten into ARPS have done all of these things. And it's using some of the same topologies of networks, even with data transmission. I see your point, but it seems like people are trying to do this kind of stuff with ARPS.This statement in the v1.1 spec addendum sums up the intention of APRS.
Completely agree about email pushing the limits even without attachments. APRS messages are a fundamental part of the spec and the SMS gateway only needs an extra 10 characters (the recipient's digits or alias if you've assigned one) beyond a regular APRS message so it's not a great deal of overhead. The nature of APRS doesn't lend itself to sustained data like that since the clients aren't expecting to recover multiple packets per message.While it is not a mobile computing solution, one can't help but see that the fact you can send email, receive messages, transmit pictures, compress date, uncompress data, and so on and on and on... is kind of self defeating as I know people that have really gotten into ARPS have done all of these things. And it's using some of the same topologies of networks, even with data transmission. I see your point, but it seems like people are trying to do this kind of stuff with ARPS.