Thursday, August 18, 2011
This Saturday (8/20/11) the Kings County Repeater Association will be participating in the annual International Lighthouse Lightship Weekend. The KCRA has once again chosen the rare Norton’s Point lighthouse in Coney Island, Brooklyn to hold this event under ILLW number US0091 and callsign KC2RA. In addition to being a lighthouse, this location was also a former Marconi wireless station and many wireless experiments were held there. If you’re in the neighborhood and would like to stop by you are welcome to do so; However, please use the “Contact Us” form located on our website first to let us know before the event, as the lighthouse is located in the private community of SeaGate.
Operating Plan (weather permitting):
Saturday, August 20th 2011 from ~9:00 AM until ~7:00 PM (13:00z until 23:00z)
Number of stations: 5 (4, 100w HF, 1 D-Star)
40m – 7.250 SSB (NVIS)
20m – 14.295 SSB, 14.070 PSK31 (1/2w Dipole)
15m – Unknown, Find us! (Vertical)
10m – Unknown, Find us! (Vertical)
6m – Unknown, Find us! (Moxon)
D-Star – 145.67, REF020A, WG2MSK(B) repeater, those on non-trust IRCDDB or non-Dplus systems may call sign route to KC2RA (please indicate you are routing)
Commemorative QSL cards for users making contact via RF (sorry dongle users) are available for a SASE and your card to:
KCRA Lighthouse Event
PO Box 280288
Brooklyn, NY 11228-0288
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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