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Rogers Explosion

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Oriley

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Yesterday I was hearing all the communications during this event which lasted till the afternoon. This was in Hennepin county and I'm way up in northern MN. Why was I hearing this?

I did hear them say as it wound down they were going back to 'their normal channel'. Was I hearing some sort of statewide thing? I think the scanner said '32'.

Thanks, just curious.
 

ofd8001

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Here's my best guess. Given the number of agencies responding to this incident, they probably assigned communications for that incident to one (or more) of the Statewide Interoperability Talkgroups. These are the F TACs, L TACs or E TACs. Or they may have patched in a Hennepin County talkgroup to a state tac talkgroup.

A savvy radio user (police officer or firefighter) from your area, probably tuned his/her radio to the state tac talkgroup to listen in on the incident. When a user selects one of those talkgroups, a link is set up between the site in your area and any other sites where a user has selected the talkgroup. (It's the "magic" of the Minnesota system).

So because an emergency responder in your area was listening to the Rogers incident on a state tac talkgroup he created a link that you were able to "piggy back" on to with your scanner.

Here's kind of an example, the way I understand the system. Let's say a state trooper in Minneapolis is in pursuit. The state patrol dispatchers will patch the state patrol district talkgroup to L TAC 1. (That's so any Minneapolis units which may assist can talk to the trooper). A police officer in Duluth can switch his portable to L TAC 1 and can listen to the pursuit (at least as long as they keep the patch in place).

A similar thing occurred years ago when the 35W bridge collapse occurred in Minneapolis. Several "outstate" users "tuned in" to the talkgroups being used. There was (and may still be) a report describing this on the state radio board site. The downside of this is that it ties up a voice channel for the "outstate" areas, reducing voice channels available for use in the given "outstate" area.

This is a pretty technical thing and trying to explain it simply can be a challenge. Hopefully I've helped you make heads or tails of this.
 
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stmills

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Dec 19, 2002
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TG 32 is ME Tac 1- Metro Tac 1- This was used by Law Enforcement on this incident, Hennepin Fire 3 was the Fire Talkgroup, I also caught traffic on STAC 1- not sure if it was a patch or not. I suspect that ME Tac 1 was patched to a Statewide Tac channel - it would not normally have tower access outside the Metro- but you will some time pick up a regional channel in a different region because of a patch to a statewide resource. Depending on the order that the patch is created depends on how the scanner world sees it but with a patch you can see an talkgroup that would normally be denied on a tower have access because it is tied to a Statewide group that has access.
 

ofd8001

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The Minnesota state system is truly a marvel of radio engineering! There are so many resources that things it can do, that make a guy down here in Kentucky truly envious.
 

yahghost

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Feb 28, 2012
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I listened to a chase from Park Rapids that went down yesterday in Anoka county and i swear it was right outside on hwy 34 in park Rapids
 
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