Data burst?

[SKYNET156]

I am in new york city to visit family, i took vacation early, i have signal stalker going and i came across 173.2850, it sounds like maybe either encryption or data burst, i am leaning more for encryption because the lengths of TX are different each time, i looked this up in the FCC ULS and nothing came up nationwide or for the state of new york, i am not sure if this is 173.2875, but my scanner rounded it off to 173.285,

 

[SOFA_KING]

I am in new york city to visit family, i took vacation early, i have signal stalker going and i came across 173.2850, it sounds like maybe either encryption or data burst, i am leaning more for encryption because the lengths of TX are different each time, i looked this up in the FCC ULS and nothing came up nationwide or for the state of new york, i am not sure if this is 173.2875, but my scanner rounded it off to 173.285,

It is data for a hydrological system. There is a thread around here with links to the national database on these. I'll see if I can dig it up. These are common on both VHF and UHF G bands. If you search you will hear many of them (I do).

Phil

 

[nd5y]

It is probably one of the data/telemetry channels

Industrial data/telemetry:
154.45625
154.46375
154.47125
154.47875
173.20375
173.2100
173.2375
173.2625
173.2875
173.3125
173.3375
173.3625
173.3900
173.39625

They can also use the 72-76 and 216-220 MHz bands

What Sofa King was refering to is the hydrological/meterological channels:
169.4250
169.4375
169.4500
169.4625
169.4750
169.4875
169.5000
169.5125
169.5250
170.2250
170.2375
170.2500
170.2625
170.2750
170.2875
170.3000
170.3125
170.3250
171.0250
171.0375
171.0500
171.0625
171.0750
171.0875
171.1000
171.1125
171.1250
171.8250
171.8375
171.8500
171.8625
171.8750
171.8875
171.9000
171.9125
171.9250
406.1250
406.1750
412.6625
412.6750
412.6875
412.7125
412.7250
412.7375
412.7625
412.7750
415.1250
415.1750

 

[SKYNET156]

Now what purpose do these serve? i have only got 173.2875 as of now on my pro 137, i dont have a digital scanner, so i dont know if these TX in P25 data?

 

[SKYNET156]

I know i also get a constant stream of data on 451.2500, i am staying in white plains with my sister, so i am not sure what is around with that frequency?

 

[nd5y]

Now what purpose do these serve?

Usually they are SCADA for stuff like water and electric utilites, pipelines, flood gauges, stream flow gauges.

 

[SOFA_KING]

I know i also get a constant stream of data on 451.2500, i am staying in white plains with my sister, so i am not sure what is around with that frequency?

Forget about that garbage. That is what the lockout button is for.

Thanks, ND5Y. I knew someone would know.

Phil

 

[ecps92]

Here you go Phil

NY - IFLOWS Files -- New York

NJ - IFLOWS Files -- New Jersey

Altho many of the PDF/HTM files have not been updated since 2002, they are still pretty accurate.

It is data for a hydrological system. There is a thread around here with links to the national database on these. I'll see if I can dig it up. These are common on both VHF and UHF G bands. If you search you will hear many of them (I do).

Phil

 

[ecps92]

FYI - 451.2500 is a TaxiCab channel

I know i also get a constant stream of data on 451.2500, i am staying in white plains with my sister, so i am not sure what is around with that frequency?

 

[cousinkix1953]

Our city water dept. sends digital transmissions on 173.2875 mhz. I never heard any voice transmissions...