Aurora Fire
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Basics
This feed uses a priority interrupt system. Talkgroups with higher priority (lower number) will interrupt talkgroups with a lower priority (higher number). Talkgroups with the same priority will not interrupt the active talkgroup.
| Talkgroup | Name | Usage | Priority |
|---|---|---|---|
| 39101 | Dispatch | Fire Dispatch | 3 |
| 39102 | Tac 2 | Fire Response | 3 |
| 39103 | Tac 3 | Incident Tac | 2 |
| 39104 | Tac 4 | Structure Fire Tac | 1 |
| 39105 | Tac 5 | Additional Tac | 1 |
| 39112 | EMS 5 | EMS Dispatch | 4 |
| 39113 | EMS 6 | EMS Response | 4 |
Alpha tags are enabled and can be seen with any supported applications that can recognize the data. Alpha tags are in the format of Name [Talkgroup ID].
Map Grids
Curious about how Aurora's map grids work? Check out this fire station map: link.
The first number represents a 1/2 mile north to south grid, the middle letter represents a 1/2 mile west to east grid, and the last number represents one of the four 1/4 mile by 1/4 mile grids that subdivides the larger grid.
An example layout of this grid system can seen below representing a 1.5 mile by 1.5 mile area made up of nine 1/2 mile by 1/2 mile grids that is divided into thirty-six 1/4 mile by 1/4 mile grids.
| 99-A-1 | 99-A-2 | 99-B-1 | 99-B-2 | 99-C-1 | 99-C-2 |
| 99-A-3 | 99-A-4 | 99-B-3 | 99-B-4 | 99-C-3 | 99-C-4 |
| 1-A-1 | 1-A-2 | 1-B-1 | 1-B-2 | 1-C-1 | 1-C-2 |
| 1-A-3 | 1-A-4 | 1-B-3 | 1-B-4 | 1-C-3 | 1-C-4 |
| 2-A-1 | 2-A-2 | 2-B-1 | 2-B-2 | 2-C-1 | 2-C-2 |
| 2-A-3 | 2-A-4 | 2-B-3 | 2-B-4 | 2-C-3 | 2-C-4 |
Live Call Information
Aurora Fire Rescue provides limited live call information in the form of the PulsePoint Respond application available for Android and iOS. Call information is only available for calls assigned a Falck Rocky Mountain ambulance, Aurora Fire Rescue's emergency ambulance provider. Detailed location information is only available for calls that occur in a public setting and non-medical calls that are assigned an ambulance.
More Information on PulsePoint: https://www.pulsepoint.org/
Download for Android
Download for iOS
Web Application (no download needed): https://web.pulsepoint.org/
Agency: Aurora Fire - Falck Rocky Mountain
Technicals
Feed Device: Raspberry Pi 3 Model B+
Receiver: RTL-SDR Blog V3
Software: OP25 (boatbod), Liquidsoap
Radio System: Aurora
This is a demonstration feed testing the features and cost effectiveness of a Pi + SDR + OP25 combination over a regular scanner. Aurora's radio system is a P25 Phase 2 four site simulcast radio system. Simulcast radio systems are notorious for being difficult to monitor on all scanners designed prior to 2018 without a special directional antenna setup. Reception is not guarenteed even with special directional antenna setup and requires some luck. Only a very limited selection of full feature top of the line scanners that costs $649.99 to $699.99 will reliably receive these systems.
The full cost of the setup in 2018 was the following:
$34.99 - Raspberry Pi 3 Model B+
$9.99 - 5V 2.5A Power Supply
$2.99 - 16GB microSD card
$34.95 - RTL-SDR Blog V3 with Dipole Antenna Kit
Total: $82.92
The approximate cost of the setup in 2023 is the following:
$45.00 - Raspberry Pi 4 Model B - 2GB
$8.00 - Raspberry Pi 15W Power Supply
$2.99 - 32GB microSD card
$43.95 - RTL-SDR Blog V3 with Dipole Antenna Kit
Total:$99.94
This is a fraction of the $649.99 price tag of a scanner designed to receive simulcast radio systems. For the price of one scanner, one could setup six standalone feeds (1x Raspberry Pi, 1x RTL-SDR) and upto eight feeds when providing two feeds per Raspberry Pi (1x Raspberry Pi, 2x RTL-SDR).
The setup is located approximately 2 miles from the nearest site using the stock RTL-SDR Blog v3 dipole antenna kit.