- November 28, 2016 at 5:29 pm #6843
I want the MUF and I want it now!
What is the MUF anyway?
In radio transmission maximum usable frequency (MUF) is the highest radio frequency that can be used for transmission between two points via reflection from the ionosphere (skywave or “skip” propagation) at a specified time, independent of transmitter power.
If you are using low power and want to maximize your signals at distance with the highest efficiency; then you want to choose a band as close to the MUF as possible.
Our homepage banner shows “MUF US BOULDER xx.xx”. But this measurement is located in Boulder Colorado, several time zones behind us and not much use…
Few New Englanders know this but there is a MUF sounding station located at Millstone Hill, MA. Millstone Hill Observatory is a Massachusetts Institute of Technology atmospheric sciences research center in Westford, Massachusetts. It is part of Haystack Observatory, which focuses primarily on radio astronomy. Millstone Hill is the location for two of the most well-known incoherent scatter radars in the world.
These soundings are made at 5-minute intervals!
As I write this, the MUF is 17.81 Mhz … gosh, I didn’t know 17 meters was still open; hope somebody hears my CQ!
You must be logged in to access attached files.March 12, 2017 at 9:52 am #11839
That’s a great resource Layne I have an app on my phone but it’s a predictor so the information is not nearly as useful.
Jim Lajoie K1BRMMarch 12, 2017 at 9:59 am #11841
I haven’t figured out the exact way they measure it or determine the compass direction for the MUF. One of our board members who works there may be able to arrange a tour of the facility this summer, so QRX!
Layne AE1NMarch 15, 2017 at 3:04 pm #12191
AN EVEN BETTER SITE!
I found an even better site. It gives you:
1. Real-Time Maximum NVIS Frequency
2. Real-Time Optimum Work Frequency
3. Real-Time Max. Usable Frequency</small>
4. Extraordinary Incident Max Frequency
5. Real-Time Effective Sunspot Number
All centered on Millstone MA, and a host of other interesting solar data.
Check it out at:
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