For those interested.
Attached is my latest high altitude chart covering ZAU and ZMP (Chicago and Minneapolis ARTCC's).
ZAU and ZMP sector boundaries and ID numbers are based on the latest official charts, all frequencies have been confirmed from personal monitoring unless otherwise noted.
The information from ZMP did not include frequencies so I have a few questions.
1) Over northern Michigan ZMP12 covers FL220 to FL310. Normally 132.42 is used from FL220 and above or when it's busy they split the sector and use 125.82 from FL370 and above. I'm guessing they only split off ZMP12 when there are military exercises in the area ? Anyone know what VHF frequency they use in ZMP12 if it's ever open ? I think maybe 118.52 used to be used but have not heard it lately ?
2) South of Minneapolis there is an ultra high sector ZMP32 that extends from FL370 and above that sits over the ZMP17/18/19 sectors. From what I can tell this sector is rarely open. In the past 128.67 was used as an ultra high frequency in this area but lately it seems they have replaced the old ZMP18 frequency 133.07 with 128.67. Is 133.07 still used ? What is the correct frequency for ZMP32 if they ever use it ?
3) ZAU41 frequency 128.40 is listed as an ultra high sector south of Chicago. I have never heard this sector open or that frequency used. Anyone know if they ever use it ? Does the controller on 134.02 simulcast on 128.40 ?
If anyone notices any changes or errors for ZMP and ZAU or can proivide more detailed info. can they please post any updates in this thread.
My intent is to try and keep the charts updated using official sources when available, although even this is not always entirely accurate, so any reports from listeners are very helpful, any feedback is appreciated. Thanks !