Good work, creators4. I can also confirm your two VA catches are consistent with what I have observed. There is a lot on the 162-174 MHz federal band that has yet to be mapped by this hobby community, so I'm glad to see that you've done some work on this.
It frustrates me when other hobbyists sometimes say, "If all the traffic on a frequency is encrypted, the fact that it is in use is irrelevant". There is a lot of useful sigint information that can be gleaned, even if an audible voice cannot be demodulated, or an intelligible stream of data characters decoded. For one, I'd like to see someone closer to the VA scan and find another frequency using NAC 3F8. That would tell us the presently unknown VA Police input. (The input for that analog channel used by maintenance is 166.7125 BTW).
Having Ensign Peak blocking the path from my location to SLC has been a bit of a hindrance, especially in associating inputs with their output frequency. The fact that so many of these operations use the default NAC 293 also complicates matters. There's undoubtedly a lot I haven't caught yet, but here's my P-25 and analog 162-174 MHz lists:
168.825,,293 NAC,in the past this was FBI A6 Ogden with input 163.1875
168.925,,293 NAC,in the past this was FBI A2 with input 162.95
171.0125,,3F8 NAC,VA Police
172.9,169.3 input??,001 NAC,TSA
407.725,416.725 input,482 NAC,US Postal Inspectors
163.2375,,203.5 pl,"on way to traffic court, rangers? Escorting large equip big + lit cot"
165.2375,166.4375 input,100.0 pl,Customs and Border Protection
168.125,164.125 input,110.9 pl,FS (Wasatch NF Primary)
168.65,,,"Forestry aircraft ""national"""
168.725,164.9375 input,,FS (Wasatch NF Logistics)
172.375,168.675 input,123.0 pl,FS (Uinta NF Logistics)
172.4,168.75 input,123.0 pl,FS (Uinta NF Primary)
172.6875,166.7125 input,141.3 pl,"maint crew, VA hospital?"
What I know is that 170.5125 (163.025 in) and 173.675 (164.775 in) are used be the BLM throughout the state, multiple sites with different pl's. 164.1 was a repeater output in the past, with 163.025 in. Since the change, I have heard some simplex.164.7000 - could this be BLM in Richfield on Simplex, I know they have atleast 3 Repeaters and that Fishlake NF also has access to those Rptrs.
I've seen that listed as well, but I find it much more likely that US Forest Service rangers would be assigned to a federal frequency. Does anyone know if UPD vehicles assigned to canyon patrol have VHF radios?163.2375 203.5 - I have in my notes from someone last March who ID'd this as the Salt Lake County Sheriff - Cottonwood Canyons Car/Car
Has anyone in the group logged any close call hits in the area?170.7500 $293 is likely the US Marshal - Court House Security [based on other National Reports]
I haven't heard any P-25 in the last few years, analog list follows:Have you also tried the 138-144/148-150.8 portion of the Fed bands?
293 appears to be a default, I strongly believe that multiple agencies in this area are using it, not just the FBI.Odd -all those former FBI [167 Mhz] now using $293
Looking for the VA Police input freq,
I thought maybe the NTIA would have frequency pairs on VHF as they do on UHF, but that is not the case.
http://www.ntia.doc.gov/files/ntia/publications/4d_5_11.pdf (Page 4-189 states):
e . An agency may use any of their allotted frequencies in the range 162.0500-166.4875 MHz and
any of their allotted frequencies in the range 169.5125-173.9875 MHz to make up a single channel pair.
Note: You can view the UHF channeling plan on page 4-193.
What I know is that 170.5125 (163.025 in) and 173.675 (164.775 in) are used be the BLM throughout the state, multiple sites with different pl's. 164.1 was a repeater output in the past, with 163.025 in. Since the change, I have heard some simplex.
163.750000, P25, nac of 293 enc no voice yet?
170.750000 heard voice traffic leaving the ADC that all i heard, so its P25-ENC.