NIFC NATIONAL AIR-TO-GROUND FREQUENCIES

The National Interagency Fire Center maintains a standard issue of nationwide air-to-ground (A/G) channels for use in firefighting and other incidents on federal lands. I have been asked for some time if I had the complete list of these A/G channels, so I decided to sit down and go through all the materials I had access to and see if I could come up with a good list.

What I discovered is that there are some variations of these A/G frequencies, and even some official US government publications don't agree. So keep in mind that this list is not cast in stone, but may have some variations...

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A/G 01            154.3100

A/G 02            166.6375

A/G 03            166.6750

A/G 04            159.3450

A/G 04            166.6875

A/G 05            166.7500

A/G 06            166.8000

A/G 07            166.8500

A/G 08            166.8750

A/G 09            166.9125

A/G 10            166.9375

A/G 11            166.9500

A/G 12            167.0750

A/G 13            167.4250

A/G 14            167.5000

A/G 15            167.5250

A/G 16            167.9500

A/G 17            167.9875

A/G 18            168.0125

A/G 19            168.1250

A/G 20            168.1750

A/G 21            168.1500

A/G 22            166.6125

A/G 23            166.7625

A/G 23            168.5500

A/G 24            168.6375

A/G 25            168.7250

A/G 25            168.7500

A/G 26            166.6875

A/G 26            169.8750

A/G 27            166.8250

A/G 27            169.9500

A/G 27            172.2750

A/G 28            170.0000

A/G 29            170.5250

A/G 30            171.1375

A/G 31            171.5250

A/G 32            166.9625

A/G 32            166.9625

A/G 32            171.5500

A/G 33            171.5750

A/G 34            167.1750

A/G 34            171.7875

A/G 35            167.2250

A/G 35            172.2250

A/G 36            172.2500

A/G 37            167.3000

A/G 37            172.2750

A/G 38            167.3750

A/G 38            172.3250

A/G 39            172.4000

A/G 40            167.4500

A/G 41            167.4750

A/G 42            167.5500

A/G 43            167.6000

A/G 44            167.6250

A/G 45            167.6500

A/G 46            167.7000

A/G 47            167.7250

A/G 48            167.8875

A/G 49            168.0375

A/G 50            168.2750

A/G 50            168.2875

A/G 51            168.3125

A/G 52            168.3875

A/G 53            168.4875

A/G 54            168.5375

A/G 55            168.5625

A/G 56            168.6625

A/G 57            168.0875

A/G 57            168.7250

A/G 58            168.0875

A/G 58            169.0875

A/G 59            169.1125

A/G 60            169.1250

A/G 61            169.2875

A/G 62            169.3625

A/G 63            171.4250

A/G 64            171.4750

A/G 65            172.3750

A/G 66            166.6750

A/G 67            159.2250

A/G 68            159.3900

A/G 69            159.4500

A/G 70            167.9500

A/G 71            168.6750

A/G 72            169.1500

A/G 73            169.2000

Some additional information on these and other NIFC assignments can be found on the Radio Reference wiki page here:

http://wiki.radioreference.com/index.php?title=National_Incident_Radio_Support_Cache&diff=98706&oldid=98699

USFS Air Tanker Base Frequency Updates

The US Forest Service has released some frequency updates for the various air tanker bases around the country. Here is the link to the update:

http://www.fs.fed.us/fire/av_safety/promotion/Information_Bulletins/IAIB%202014-01%20AT%20Base%20Freq%20changes.pdf

NIFOG 1.5 Available

The latest version of the National Interoperability Field Operations Guide (NIFOG) is now available for downloading. You can find links to the various formats of downloads here:

http://www.dhs.gov/national-interoperability-field-operations-guide

This new version contains updated information as well as new information that anyone interested in communications monitoring will find useful.

WHCA Blog

I just stumbled upon a blog page that I haven't seen before. It has some interesting information about the White House Communications Agency (WHCA) history and some interesting facilities and photos. Check it out here:

http://whcacannonball.blogspot.com

BATFE Update

Just as the May issue of The Spectrum Monitor came out, with my column concerning the Bureau of Alcohol Tobacco Firearms and Explosives (BATFE), I received an update regarding the channel usage by this agency.

For as long as I've been listening to federal stuff, the ATF has always used 165.2875 MHz as their primary channel. However, with the eventual refarming of the VHF 162-174 MHz federal band to make a standard repeater offset (see the January Federal Wavelengths column for more information), this was bound to change. Information is that at least one major metro area, the ATF has already changed their primary repeater output to 170.9625 MHz, N650 with 165.2875 MHz as the input frequency. I have not run into this change in my travels yet, but will definitely keep an eye out for it.

SoCal DEA going VHF?

I just caught some traffic on a VHF channel with some radio techs regarding receive sites and signal strengths as well as a radio interface bridge. The conversation was on 173.1625 MHz, N156, and I only heard one side of the conversation most of the time, but did hear a couple of replies from a field unit. I also heard one person ask if they were on the "APX" radio. APX is the Motorola radio series that features multi-band operation in a single radio.

This joins the frequencies of 170.6500 MHz and 170.9500 MHz that are most likely VHF DEA channels that have been heard in the Southern California area.

SoCal CBP Marine Common?

While in the Los Angeles area for work, I was picking up some of the many VHF P-25 frequencies being used throughout the southern end of the state by the CBP wide area system. This system is technically separate, but fiscally part of the Integrated Wireless Network (IWN). These are not trunked, but likely a vote-scan system used mainly by CBP Field Operations and Border Patrol. I have noted what is probable use by other agencies as well, such as Coast Guard and likely ICE.

I was checking what I was hearing against what I think is a pretty good source for the area, the SoCal Fedcom Blog, http://socalfedcom.blogspot.com. Among some of the updated frequencies, there is a reference to something the blog author is referring to as the MCS or Marine Common System. I would presume this refers to a common radio system for CBP, Coast Guard and other agencies working the various maritime operations.

Here are the frequencies noted as being part of the MCS:

162.6250 MHz, N820 - common input
171.3250 MHz, N820 - Mt. Solidad repeater
172.0625 MHz, N820 - Santa Ynez repeater
172.7125 MHz, N820 - San Pedro repeater

Reports indicate a fourth repeater located on San Nicolas Island, but the frequency is unconfirmed.

I'm still researching and trying to find more information on this system. 

UPDATE!

While searching early one morning in LA, I found 171.1875 MHz, N820 active with encrypted voice. This might be the missing San Nicolas Island repeater, as I had a nice marine layer working the day I found this!

New BoP System Near Philadelphia?

I'm monitoring a P25 trunking control channel in the Philadelphia area that doesn't match up with what I've heard in the past and is not listed on Radio Reference.

The control channel is currently on 410.0000 MHz, shows a System ID of 4C6, WACN of BEE00. The only system frequencies I have heard so far are 406.8125, 409.2125 and the control channel on 410.0000 MHz. The voice channel NAC is N4C1. These frequencies have been used in other Bureau of Prisons trunked systems in other parts of the country.

Anyone have any information on this one? I am guessing that the Federal Detention Center in Philadelphia has upgraded their Motorola Type II trunked system to a P25 system on some new frequencies.

Harlingen TX Logs

I received a few frequencies logged from a friend on a trip down to South Padre Island and Harlingen, Texas. Here is what was picked up:

162.2875, NAC A50 - New CBP Border Patrol
163.1375, NAC 293 - US Coast Guard NET 113
163.4750, NAC A61 - New CBP Border Patrol
169.2625, NAC 293 - CBP OAM AIR 3
171.2375, NAC 293 - US Coast Guard NET 127
172.7125, NAC A60 - New CBP Border Patrol
410.4125, NAC 156 - DEA, new F11

Here are some additional CBP Border Patrol Rio Grande Valley area frequencies that have been posted previously:

163.0625, NA40
163.5250, NA10
163.6500, NA60
163.9750, NA21
164.4375, NA51
164.7375, NA41
166.9875, N310
168.3875, N312
169.5750, NA80
169.6000, NA20
169.6375, NA31 - CBP WESLACO 2
169.6625, NA30 - CBP WESLACO 1
170.1250, NA40
170.3375, NA50
170.4375, NA61
170.5375, NA40 - CBP HARLINGEN 1
170.9875, NA60
171.1875, NA20 - CBP McALLEN
171.1875, NB20
171.3250, NA11 - CBP RIO GRANDE CITY 2
171.3250, NA41 - CBP HARLINGEN
171.6625, NA12 - CBP RIO GRANDE CITY 1
171.6625, NA51
171.7125, NA22 - CBP McALLEN 2 
171.9625, NA10 - CBP RIO GRANDE CITY
171.9875, N311
172.2375, NC20
172.2625, NA21 - CBP McALLEN 1

Houston Federal Activity

I came across a couple of interesting posts regarding federal activity in the Houston, Texas area.

The first was some security detail activity on 168.3500 MHz, N100. Over the years I have caught several security details using this common federal frequency. In at least two cases it was the US Capitol Police providing security for members of Congress. However, I was not able to confirm the P25 NAC on those catches.

Best guess is that this Houston activity was the protective detail for Health and Human Services (HHS) Secretary Sebelius. The original poster also mentioned the code name FLOODGATE was associated with this detail.

Second catch from Houston was on 170.8500 MHz, N864, with some testing in the clear that identified this as "USMS Channel B", with USMS being the US Marshals Service. The P25 NAC of N864 has been speculated as being the US Marshals for a while, but not much has been provided for proof. This catch helps tilt the scales a bit towards confirmation.

New Federal VHF TRS

Some recent postings on Radio Reference are providing some details of a new VHF P-25 trunked system somewhere in northern Virginia. Here are the system details that are known;

System ID - 00A
WACN - 0000A
System NAC - 01F
Tower - 101

Main CC - 170.46250
Alt CC - 171.17500
Alt CC - 172.35000
Alt CC - 173.51250

All traffic has been encrypted so far, and no other towers appear to be a part of this system. Some have indicated the information gleaned from running the PRO96COM software package on this system show that it has APCO P25 Phase II TDMA capabilities.

I have noted that the System ID of 00A has shown up on several new trunked systems around the country and I had heard that this System ID is the "default" ID for Harris P25 systems.

I will post more information when it comes in!

US Capitol Police Trunked System

I saw a posting from Alan Henney about the new VHF trunked system in use by the US Capitol Police. The system is apparently in limited use and Alan was able to watch the system activity using PRO96COM software during the State of the Union speech on January 26th. Here's what he found:

System ID = 582
WACN = BEE00

Frequency       Input Frequency        Hit Count
172.6875        165.0875        193
172.3875        164.8125        184
172.9625        165.5375        183
173.1625        165.7750        12 (alternate control)
173.8125        166.4250        79 (alternate control)
170.1375        162.8000        199
169.5750        136.0000        191
173.4750        166.2250        42 (alternate control)
169.8375        162.6125        189
170.3750        163.1625        202
171.7875        164.6125        212
171.4125        164.3250        199
171.0000        164.0125        171
170.5750        163.6000        0 (primary control)

Alan also posted that the new system is being used along with the old, analog repeaters as well. So it appears that the USCP has not moved all operations to the new system full time yet.

Super Bowl XLVIII CAP Flights

It appears that the expected combat air patrol flights will begin with some training on Wednesday, the 29th;

"Individuals in and around the East Rutherford area can expect flights to begin Jan. 29 around 4:30 a.m. EST and continue for approximately one hour.
Exercise Amalgam Virgo 14-01, a NORAD air-defense exercise, will be conducted Wednesday in the greater East Rutherford area so interagency partners can practice procedures for responding to airspace violations."

http://www.norad.mil/Newsroom/PressReleases/tabid/3993/Article/7695/conr-to-fly-air-defense-exercise-in-preparation-for-super-bowl-xlviii.aspx

Super Bowl XLVIII

Things are starting to ramp up at Super Bowl XLVIII in E. Rutherford, New Jersey. The Department of Energy began doing aerial surveys of nominal radiation over most of northern New Jersey this week. Today (1/23) they were operating in the vacinity of MetLife Stadium, where the game will take place on February 2nd.

Happy 2014

I'm a few days late, but wanted to wish all the Fed Files fans a very Happy New Year!

This year marks the start of my Federal Wavelengths column that appears monthly in The Spectrum Monitor e-magazine. If you haven't checked it out yet, you can click on the link below and see what it is all about. You can subscribe to the magazine or purchase a single issue if you like:

http://www.thespectrummonitor.com

Updated Email Address

Just a reminder to all the folks out there who want to get in touch with me. My old email address at Monitoring Times will be going away soon, so emails should now go to my new address.
chrisparris @ thefedfiles.com.

The Spectrum Monitor is Out!

The first issue of The Spectrum Monitor is now available for download. If you have a subscription, you should have received an email with instructions on downloading your copy. If you want to purchase a single copy, you can do so by visiting the web site at http://www.thespectrummonitor.com

The magazine is in a digital PDF format that can be viewed on almost any current digital device, including computers, tablets and smart phones.

Luke AFB Moves to P25 Trunked System

Reports from the Phoenix, AZ area indicate that a new, APCO P-25 trunked radio system is in operation at Luke AFB near Glendale, a suburb of Phoenix. This new system has superseded the older UHF Motorola trunked system that has been serving the base for years.

According to listener provided information, here are the system specifics:

SYSTEM ID = 3D6
WASN = BEE00
SITE NAC = N3DE
SITE = 014
RFSS = 001

406.3625
406.5625
407.1625
407.3625
407.7625
407.9625
408.5625
408.7625
408.9625 - ALT CC
409.3625 - ALT CC
409.5625 - ALT CC
410.1625 - PRI CC


http://www.radioreference.com/apps/db/?sid=7769

Interestingly, this trunked system shares the same System ID with two other trunked systems, also located at Air Force Bases in Florida and Mississippi. Information in the Radio Reference thread indicates this a planned wide-area system to service many USAF installations, in a similar way the ELMR 014C trunked system serves the Navy & Marines.

I also just noted that the P25 trunked system down in Tucson, AZ at Davis-Monthan AFB is showing a System ID of 3F6, and a Site ID of 002. Part of the same network? Maybe someday...

US Capitol Police Trunked System On The Air

I just started monitoring the new US Capitol Police VHF P-25 trunked system that should replace the analog VHF conventional channels that are currently in use.

Here is what the system that is on the air is showing for details at this time:
SYS ID - 582
SITE NAC - N580
SITE - 001
WACN - BEE00

173.1625
173.8125
173.4750
170.5750

No affiliations or channel grants are being shown right now, as previous new reports were that the system is on line for coverage testing.

Coast Guard Data Bursts?

I have recently seen complaints from multiple locations about hearing some sort of digital noise or interference on the Coast Guard primary air operations frequency of 345.0 MHz. I thought I was not hearing it myself, but I set up one of my tunable wide-band receivers on this frequency and did hear it clearly when I opened the receiver squelch all the way.

What I am hearing is a series of short bursts  of noise, almost like a burst of machine gun fire. The length seems to be from 4 to 6 "bursts" in a group, although some have been two groups of 4 or more in a row. I can also heard weaker stations followed by bursts from stronger stations. Sometimes the bursts are at a moderate tempo, and some seem to be very rapid compared to others.

Here are some short clips of what I heard. Turn the volume up when watching these:

At first I wasn't sure if these noises were intentional or just some form of interference, but after  hearing them and listening to the patterns, I am guessing they are intentional usage of the frequency by the Coast Guard. As to what this is used for and why they are using this frequency remains a mystery. Anyone want to guess at what's going on here?