Sunday, January 15, 2012
Pure Michigan in January
Your trip begins at michigan.org.
Auto Showcase Takes Center Stage in Detroit
See the most innovative auto designs in the world as more than 500 vehicles debut at North America's largest and most prestigious automotive showcase. Read More
Culinary Destinations Make Great Winter Getaways
Escape into a world of wine, food and fun this winter with a delightful Michigan culinary excursion. From festivals to cooking classes, every foodie is sure to find something to satisfy their appetite. Read More
Snowshoe Hikes and Lantern-Lit Winter Fun
Looking for another great winter family adventure? Michigan state parks are groomed and ready--day and night--with fun activities at an affordable cost. Read More
UP Slope Patrol
Head to Michigan's western Upper Peninsula for your next ski getaway and experience top notch resorts with all of the amenities that cater to avid downhill ski enthusiasts. Read More
Winter Events Buzz
From concept cars to sled-dog races, from ice festivals to ski jumping competitions and great museum exhibits-- Michigan stages unforgettable events all through the month of January. Read More
HOW TO READ PROPAGATION NUMBERS
The A index [ LOW is GOOD ]
- 1 to 6 is BEST
- 7 to 9 is OK
- 11 or more is BAD
Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.
A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
SFI index [ HIGH is GOOD ]
- 70 NOT GOOD
- 80 GOOD
- 90 BETTER
- 100+ BEST
The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.
Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.
K index [ LOW is GOOD ]
- 0 or 1 is BEST
- 2 is OK
- 3 or more is BAD
- 5 is VERY VERY BAD
The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.
A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
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