What is the data on 409.800?

[jkm]

Hello to all,

I was scanning around for fun this evening and ran across some data transmissions on 409.800 here in the Columbus area. Does anybody know what this might be used for? I'm not sure even what this part of the band is allocated for.

Thanks for your help!

Justin/W1IX

 

[Colin9690]

Wow, I plugged that freq into my PRO-2055 with the volume up loud, and boy is that an annoying sound! I would think it would be impossible to find out who uses it, since there is no voice transmission. I don't think the FCC provides listings for data frequencies (correct me if I'm wrong). I always thought that the 400-410 MHz band was for Federal or Military use...

 

[mmartinfan]

Data for a Cab company

 

[wa8pyr]

Data for a Cab company

Not on 409.800.... that's government frequency.

Tom

 

[mmartinfan]

I guess I need to clean my glasses because I swear that said 469.800.

Does DSCC have MDT/MDC ?

 

[w4rtt]

Any more thoughts on this frequency? Also hearing it in the Cincinnati area.

 

[ecps92]

Airport Telemetry. FAA or NOAA

Any more thoughts on this frequency? Also hearing it in the Cincinnati area.

 

[gtaman]

Federal paging frequency I think. And the DSCC uses P25 for security and fire.

 

[w4rtt]

No, this sounds like the morse character I ( .. ), sent in succession.

 

[w4rtt]

Here is a recording of what is on 409.800 in the Cincinnati area.

https://www.dropbox.com/s/0jlh4g78j4lnwbp/409_800.wav?dl=0

 

[ecps92]

Telemetry

I Commonly hear it near most airports (Large and Small)

FAA and NWS have various modes in use for Wind Shear and other observations

I've heard this on 408.0000, 408.8250, 409.1750, 409.5500, 409.5750, 409.8000, 409.8250, 409.8500, 410.0000, 410.3000, 410.9500, 412.5375, 412.7750, 413.0625, 413.1125, 413.6000, 414.0125, 415.000, 415.0375, 416.8750, 419.0250 over the years

Here is a recording of what is on 409.800 in the Cincinnati area.

https://www.dropbox.com/s/0jlh4g78j4lnwbp/409_800.wav?dl=0