Sunday, April 1, 2012

KD8BIG / Articles of Interest

Hello all,

I've been under the weather for the last few weeks so this is a short post~
Articles of Interest~

Google Declares “Morse Code Is Perfect” with New Gmail Tap Mail Program

On April 1, Google announced that it has unveiled a new way to use its popular Gmail e-mail system. Called Gmail Tap, it uses dots and dashes to form letters, a system of communicating that should be very familiar to radio amateurs. “Morse code is perfect,” said Gmail Tap Engineer Mitch Fedenko. “It’s just a dot and a dash. What’s simpler... [continue]

ARRL in Action: What Have We Been Up to Lately?

Compiled by S. Khrystyne Keane, K1SFAARRL News Editork1sfa@arrl.orgThis feature -- including convenient Web links to useful information -- is a concise monthly update of some of the things ARRL is doing on behalf of its members. This installment covers the month of March.New privileges on 60 meters went into effect on March 5. After communicating w... [continue]

Eric P. Nichols, KL7AJ, Wins March QST Cover Plaque Award

The winner of the QST Cover Plaque Award for March is Eric P. Nichols, KL7AJ, for his article “Three Wrong Assumptions about the Ionosphere.” Congratulations Eric! The QST Cover Plaque award -- given to the author or authors of the best article in each issue -- is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. Cast ... [continue]

ARNewsline Report 1807 -- Mar. 30 2012:

 The following is a Q-S-T. The next Global Amateur Radio Emergency Conference to be hekd in Malaysia; 1700 South African hams let their licenses lapse, World amateur Radio Day to celebrate 50 yesrs of ham radio in space, Japan to launch five new hamsats, DXCC is going on-line and Roving Reporter Pierre Pulinmyleg returns with a truly out of this... [continue]
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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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