I left the rig and packet software running today while I was at work. I was listening to the LightSail beacon on 437.435 MHz. I had one entry on the screen when I got home:
1: Fm V-3 to 70-9 Via uH, , , -6 <RR P/F R5>[07:25:21]
No idea what it means, not sure if it was LightSail or not. Posted as an FYI. Curious to know what it might be.
The packet modems relay on a CRC checksum of the packets to validate the data received as a good packet.
In some situations, like yours when a modem is listening a long time, the noise can "forge" a "good" packet. This is a statistically proved fact, the CRC is not as strong as we wish for this task.
I'm not saying that this is a noise forged packet, but it's a possibility.
73
El 27/05/15 a las 20:07, Kelley escibió:
I left the rig and packet software running today while I was at work. I was listening to the LightSail beacon on 437.435 MHz. I had one entry on the screen when I got home:
1: Fm V-3 to 70-9 Via uH, , , -6 <RR P/F R5>[07:25:21]
No idea what it means, not sure if it was LightSail or not. Posted as an FYI. Curious to know what it might be.
Yup, I think I'll chalk it up to noise. Thanks all.
Kelley - WØRK
On 5/28/2015 7:41 AM, Pavel Milanes Costa wrote:
The packet modems relay on a CRC checksum of the packets to validate the data received as a good packet.
In some situations, like yours when a modem is listening a long time, the noise can "forge" a "good" packet. This is a statistically proved fact, the CRC is not as strong as we wish for this task.
I'm not saying that this is a noise forged packet, but it's a possibility.
73
El 27/05/15 a las 20:07, Kelley escibió:
I left the rig and packet software running today while I was at work. I was listening to the LightSail beacon on 437.435 MHz. I had one entry on the screen when I got home:
1: Fm V-3 to 70-9 Via uH, , , -6 <RR P/F R5>[07:25:21]
No idea what it means, not sure if it was LightSail or not. Posted as an FYI. Curious to know what it might be.
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participants (2)
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Kelley -
Pavel Milanes Costa