Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
John Brier, KG4AKV, Raleigh, NC, FM05
For the packet data take a look at UISS software... also for those SSTV transmissions from the ISS look at RX-SSTV..
You will also need a packet engine...
Here is what I use
Packet Engine Pro web site = http://www.sv2agw.com/ UISS and RX-SSTV web site = http://users.belgacom.net/hamradio/
Hope this helps
73's David KK4QOE
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of John Brier Sent: Friday, May 01, 2015 5:18 PM To: AMSAT BB Subject: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
John, Almost forgot... those are basically APRS packets you are hearing.. so to test your setup prior to waiting for the ISS to fly over tune your radio to 144.39 to listen a test the software...
Then when it's working to your satisfaction tune back over to the ISS data and listen away...
Thanks
David
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of David L Warnberg Sent: Friday, May 01, 2015 5:45 PM To: 'John Brier'; 'AMSAT BB' Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
For the packet data take a look at UISS software... also for those SSTV transmissions from the ISS look at RX-SSTV..
You will also need a packet engine...
Here is what I use
Packet Engine Pro web site = http://www.sv2agw.com/ UISS and RX-SSTV web site = http://users.belgacom.net/hamradio/
Hope this helps
73's David KK4QOE
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of John Brier Sent: Friday, May 01, 2015 5:18 PM To: AMSAT BB Subject: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Basically they are AX.25 packets NOT APRS packets. I know that on my radio (D710), the setup to work the ISS via packet is different from the normal APRS setup. It's been a while since I've done either on that radio, but I do know that the setups are mutually exclusive.
Jeff Moore -- KE7ACY
On Fri, May 1, 2015 at 3:17 PM, David L Warnberg [email protected] wrote:
John, Almost forgot... those are basically APRS packets you are hearing.. so to test your setup prior to waiting for the ISS to fly over tune your radio to 144.39 to listen a test the software...
Then when it's working to your satisfaction tune back over to the ISS data and listen away...
Thanks
David
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of David L Warnberg Sent: Friday, May 01, 2015 5:45 PM To: 'John Brier'; 'AMSAT BB' Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
For the packet data take a look at UISS software... also for those SSTV transmissions from the ISS look at RX-SSTV..
You will also need a packet engine...
Here is what I use
Packet Engine Pro web site = http://www.sv2agw.com/ UISS and RX-SSTV web site = http://users.belgacom.net/hamradio/
Hope this helps
73's David KK4QOE
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of John Brier Sent: Friday, May 01, 2015 5:18 PM To: AMSAT BB Subject: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Which program is used for APRS packet Window 7?
----- Original Message ----- From: "Jeff Moore" [email protected] To: "AMSAT BB" [email protected] Sent: Friday, May 01, 2015 6:28 PM Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Basically they are AX.25 packets NOT APRS packets. I know that on my radio (D710), the setup to work the ISS via packet is different from the normal APRS setup. It's been a while since I've done either on that radio, but I do know that the setups are mutually exclusive.
Jeff Moore -- KE7ACY
On Fri, May 1, 2015 at 3:17 PM, David L Warnberg [email protected] wrote:
John, Almost forgot... those are basically APRS packets you are hearing.. so to test your setup prior to waiting for the ISS to fly over tune your radio to 144.39 to listen a test the software...
Then when it's working to your satisfaction tune back over to the ISS data and listen away...
Thanks
David
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of David L Warnberg Sent: Friday, May 01, 2015 5:45 PM To: 'John Brier'; 'AMSAT BB' Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
For the packet data take a look at UISS software... also for those SSTV transmissions from the ISS look at RX-SSTV..
You will also need a packet engine...
Here is what I use
Packet Engine Pro web site = http://www.sv2agw.com/ UISS and RX-SSTV web site = http://users.belgacom.net/hamradio/
Hope this helps
73's David KK4QOE
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of John Brier Sent: Friday, May 01, 2015 5:18 PM To: AMSAT BB Subject: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet _145825_2015-04-30-1540_UTC_two.wav
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
I don't like flag wars, but in *my experience* windows soundomdem & direwolf are the two best...
Direwolf has a powerful processing on the RX path with only a few missing packets but doesn't do connected mode (on windows), soundmodem have a better (easy?) GUI than Direwolf.
This two has the smallest rate of "not decoded" packet so far in my tests on 300/1200 bauds
Both talks KISS and AGW protocols, that's enough for APRS compatibility wit 99% of the APRS software on the market.
Other softs are AGW-PE, MixWin, Linux Soundmodem.
I repeat, in *my experience*...
Tip 1: there are two "soundomdem" software, one for linux with a few years of work and a recent one for windows that has nothing to do with the linux version, so it's desirable that we refer to the sistem of soundmodem when we speak...
Tip 2: Direwolf is multi-platform, it can work on linux also, and integrates 100% with the AX.25 stack/xastir/etc...
73
El 01/05/15 a las 18:33, Rich/wa4bue escibió:
Which program is used for APRS packet Window 7?
----- Original Message ----- From: "Jeff Moore" [email protected] To: "AMSAT BB" [email protected] Sent: Friday, May 01, 2015 6:28 PM Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Basically they are AX.25 packets NOT APRS packets. I know that on my radio (D710), the setup to work the ISS via packet is different from the normal APRS setup. It's been a while since I've done either on that radio, but I do know that the setups are mutually exclusive.
Jeff Moore -- KE7ACY
On Fri, May 1, 2015 at 3:17 PM, David L Warnberg [email protected] wrote:
John, Almost forgot... those are basically APRS packets you are hearing.. so to test your setup prior to waiting for the ISS to fly over tune your radio to 144.39 to listen a test the software...
Then when it's working to your satisfaction tune back over to the ISS data and listen away...
Thanks
David
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of David L Warnberg Sent: Friday, May 01, 2015 5:45 PM To: 'John Brier'; 'AMSAT BB' Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
For the packet data take a look at UISS software... also for those SSTV transmissions from the ISS look at RX-SSTV..
You will also need a packet engine...
Here is what I use
Packet Engine Pro web site = http://www.sv2agw.com/ UISS and RX-SSTV web site = http://users.belgacom.net/hamradio/
Hope this helps
73's David KK4QOE
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of John Brier Sent: Friday, May 01, 2015 5:18 PM To: AMSAT BB Subject: [amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
_145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
_145825_2015-04-30-1540_UTC_two.wav
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
_145825_2015-04-30-1540_UTC_one.wav
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
_145825_2015-04-30-1540_UTC_two.wav
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
I could be wrong, but it's possible you may have heard a different satellite transmitting. It's also possible and more likely, you heard someone with their APRS or Packet station on the wrong frequency. This occurs occasionally with certain dual band radios with built in packet modems like the D700/D710 or the Alinco 635 in that they are in a packet or APRS mode and for whatever reason, the operator changes to a different frequency on that side of the radio w/o shutting off the data capability. It can happen on single band radios as well but not as often, it's easy to do it with the dual band radios. This occurs all to often all over the country. I hear it once or twice a month on repeater and simplex frequencies in my area so I know it's a widespread occurrence.
7 3 Jeff Moore -- KE7ACY
On Fri, May 1, 2015 at 2:18 PM, John Brier [email protected] wrote:
Thanks for all the responses on SO-50 preamps and portable setups. I'm still digesting the info.
TL;DR: I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
Here's another question that has me excited:
Yesterday after having visited with family in Maplewood, New Jersey for several days, I drove home to North Carolina. I knew there was an ISS pass at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to 145.825 MHz and heard its digipeater easily.
Then I left the radio on.
I'm not sure where I was in NJ, but about one hour later, around 11:33 AM local/1533 UTC, I heard packet on the frequency again but I was confused because there weren't supposed to be any more passes for a while. I confirmed on my phone that the ISS was over some far away ocean at the time I was hearing these new transmissions, so I knew they must be terrestrial. Still, it seemed odd that someone or something was transmitting when the ISS wasn't in sight...
Maybe it's an internet gateway I thought. Or do people leave their stations on the ISS frequency 24/7 so they can "work" any pass that happens?
I tried recording videos of the transmissions for later decoding to figure out who or what it was. Eventually I realized it was transmitting every 2 minutes. It was almost certainly an automated setup, adding credence to the idea that this was an internet gateway. Unfortunately, before I realized that, and after recording one video of it, the best reception I received during my drive by "pass," I wasn't recording. As I drove further away it only got weaker and weaker. I did manage to get two half way decent recordings of it, but I have tried decoding them with Soundmodem on Windows and it's not printing out anything like it normally does. I am very new to packet, only becoming interested in it because the ISS uses it, so I thought maybe someone else might be more equipped to decode it. Or certainly someone could shed some light on what I heard, maybe the operator in NJ is on this list.
I used Audacity to record the audio off the videos I made as well trim and amplify the audio, but I haven't done anything else, though if someone wants the unedited videos I can put them up too.
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet...
John Brier, KG4AKV, Raleigh, NC, FM05 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
They are probably from PCSAT (NO44) which also acts like a digipeater on 145.825 when sun angles are good. But PCSAT is *barely alive*. It can barely do one or two packet users per pass before the batteries die again (every orbit).
You can hear PCSAT more than you can decode it, since the batteries are so weak, they usually cannot even finish a single packet before the TX power drops off to nothing. So you never decode bcause you don't get the valid checksum at the end. You might tyry having PASSALL ON...
Bob, WB4APR
I heard automated packet transmissions on the ISS packet frequency when the ISS wasn't in sight and recorded them to try and figure out who/what they are, but my software isn't decoding anything. Can you help me understand what they were, or even better, decode them yourself?
Quoting Jeff Moore who wrote on Fri 2015-05-01 at 15:11:
I could be wrong, but it's possible you may have heard a different satellite transmitting.
Trying to find out why I had satellite 2014-033M added to my gpredict lists I found out this is satellite Dutchifat-1 which also does APRS on 145.825 MHz :
http://amsat-uk.org/2012/08/29/duchifat-1-a-145-825-mhz-aprs-cubesat/
Koos van den Hout PD4KH
participants (7)
-
David L Warnberg -
Jeff Moore -
John Brier -
Koos van den Hout -
Pavel Milanes Costa -
Rich/wa4bue -
Robert Bruninga