Glendora Emergency Response Communications

Propagation Report for Field Day Looks Good!

Jun 25, 2004

SB PROP @ ARL $ARLP026
ARLP026 Propagation de K7RA

ZCZC AP26
QST de W1AW
Propagation Forecast Bulletin 26 ARLP026
From Tad Cook, K7RA
Seattle, WA June 25, 2004
To all radio amateurs

SB PROP ARL ARLP026
ARLP026 Propagation de K7RA

This is Field Day weekend! Conditions don't look bad, although there is the chance of geomagnetic conditions becoming unsettled. This week the sunspot numbers have improved, while geomagnetic conditions were quiet, which is a great combination. Average daily sunspotnumbers rose over 50 points from last week to 116. Average daily solar flux was up almost 18 points to 113.7. Sunspot numbers were the highest on June 20 and 21, Sunday and Monday, and both the
planetary and mid-latitude A indices were very low, in the lower single digits.

Look at http://www.sec.noaa.gov/ftpdir/indices/DGD.txt and you can see the K index at 1 and 0 at all locations for several days.

Sunspot groups 634 and 635 provided most of the activity, and today they are moving out of view. As a result, predicted sunspot and solar flux numbers are a bit lower, with the solar flux forecast for Friday through Monday, June 25-28 at 100, 95, 95 and 90. The predicted planetary A index for the same four days is currently at
12, 12, 15 and 15. This is due to weak high-speed solar wind from a recurrent coronal hole coming into view.

K7RA will operate some this weekend, under Class C, which is for stations in vehicles capable of operating while in motion, and normally operated in this manner. I'll probably be on 15 and 20
meters, both phone and CW, and 10 meters if it shows any life, and the operating style will be casual. One of the fun things about the Field Day operating activity is that the paperwork is very easy.

When submitting a contest entry, you only turn in a list of stations worked, sorted alphanumerically and divided by band and mode, along with a summary sheet.

Unlike the ARRL Sweepstakes or DX contests, you will never lose points for incorrectly copying the exchange from the other station or the time of the contact because you don't even report it. Only the call sign is recorded in the appropriate band/mode list. There are no multipliers for numbers of states or sections worked or for
DX. I'll probably just sort my call sign lists on a laptop with a simple text editor or word processor while operating, then e-mail inthe results. See http://www.arrl.org/contests/announcements/fd/ for
rules.

For this year's Field Day, 20 meters will be your best band, and possibly 15 as well. 10 meters may be good for some sporadic E skip. 40 and 80 meters should be good after dark. Run some numbers using a sunspot count of 100 or 105 and a K index of 2 or 3 on W6ELprop to get some ideas of where openings might point to at different times. You can download this free at http://www.qsl.net/w6elprop/.

Sunspot numbers for June 17 through 23 were 106, 118, 90, 142, 139, 113 and 104 with a mean of 116. 10.7 cm flux was 111.3, 107.8, 112.7, 119.1, 115.8, 116.7 and 112.5, with a mean of 113.7.

Estimated planetary A indices were 7, 8, 5, 3, 4, 4 and 5, with a mean of 5.1. Estimated mid-latitude A indices were 7, 10, 4, 3, 3, 1 and 2, with a mean of 4.3.
NNNN
/EX