Friday, April 1, 2011

KD8BIG & Articles of Interest

The last few weeks I have not been feeling to well. Many health issues along with two ambulance rides to the hospital. I am hoping to get back into the swing of things over the next few days.

de KD8BIG
KD8BIG Twitter

Articles of Interest
Ham radios find place in high-tech wor
Girl, 8, parents band together as ham radio operators
Amateur radio balloon video
Ham radio operators concerned about losing band
Local hobbyists riding the waves
ULM students earn amateur radio licenses

This Weekends Contest

NCCC SprintApr 1
SOC Hank Kohl Memorial CW BashApr 2
LZ Open 40m Sprint ContestApr 2
ARCI Spring QSO PartyApr 2-3
SP DX ContestApr 2-3
EA RTTY ContestApr 2-3
QCWA Spring QSO PartyApr 2-3
Missouri QSO PartyApr 2-3
RSGB RoPoCo SSBApr 3
RSGB 80m Club Championship, CWApr 4

My Stamp Collecting Blog

Counter Added January 1, 2011

free counters

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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