Wednesday, September 1, 2010

M.A.A.R.C. 2 Meter Net

I'm NCS tonight on the M.A.A.R.C. 2 meter net. Due to the current Hurricane and other Tropical Storms in the Atlantic I think I will talk about the Hurricane Watch Net.
The Hurricane Watch Net was established in 1965 for the purpose of providing support to the National Hurricane Center during times of tropical storm emergencies. Through our associated network of Amateur Radio Operators, emergency communications support to the NHC is of primary interest.
The Hurricane Watch Net and the operation at WX4NHC at the National Hurricane Center in Miami are manned entirely by volunteers. We activate whenever a system has achieved hurricane status and is within 300 miles of populated land mass or at the request of the National Hurricane Center.

Net operations are conducted on 14.325 MHz.

The Hurricane Watch Net serves two purposes:
  1. To disseminate the latest National Weather Service advisories on active hurricanes in both the Atlantic and Pacific side of the Americas. This includes transmissions to any maritime amateur radio operators that may be in the affected area.
  2. To gather real-time ground level weather conditions from amateurs in the affected areas and to get these reports to the National Hurricane Center via WX4NHC in a timely and accurate fashion.
Along with these weather reports, often come reports on damaged roads power outages, structural damage, phone and communications links, and of course reports on injuries and deaths. These non-weather report items are usually relayed to other nets in operation on 20, 40, and 80 who are focusing on Health & Welfare, or by the crew at WX4NHC to the appropriate agencies that stay in touch with the National Hurricane Center.
For more info on the Hurricane Watch Net visit their web-site; http://www.hwn.org/

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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