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- SB PROP @ ARL $ARLP009
- ARLP009 Propagation de KT7H
-
- ZCZC AP23
- QST de W1AW
- Propagation Forecast Bulletin 9 ARLP009
- >From Tad Cook, KT7H
- Seattle, WA March 4, 1994
- To all radio amateurs
-
- SB PROP ARL ARLP009
- ARLP009 Propagation de KT7H
-
- Solar flux was down an average of 10 points this past week, but
- conditions were stable. Most days the A index was in the single
- digits, and many periods had a K index of one or zero. This means
- much less absorption of radio waves and better propagation than the
- previous week.
-
- Gradually there is a change toward Spring conditions in the Northern
- Hemisphere. Usable frequencies during the day will be a bit lower,
- but at night they will be higher. Look for better propagation to
- the Southern Hemisphere as we move toward the equinox, and the
- Southern Hemisphere changes from Summer to Fall.
-
- During the DX contest this weekend the solar flux should be reaching
- a short term peak, but there is a possibility of more disturbed
- conditions due to a recurring coronal hole on the Sun. These
- disturbed conditions could produce K indices of four and five during
- the contest and through the next week. Conditions should stabilize
- by the middle of March when the solar flux will also reach a near
- term low near 95. Look for the flux to peak again near 105 around
- March 23.
-
- Sunspot Numbers from February 24 through March 2 were 58, 53, 63,
- 69, 64, 61 and 77, with a mean of 63.6. 10.7 cm flux was 105, 96.7,
- 94, 95, 92.5, 94.1 and 98, with a mean of 96.5.
-
- The path prediction for this weekend is from San Francisco,
- California to Taiwan.
-
- 75 meters should start to open around 0930z and be good from 1030 to
- 1500. Peak hours are from 1130 to 1400. 40 meters should open from
- 0930 to 1600, and 30 meters from 0830 to 1700.
-
- 20 meters is likely to be open from 1530 to 1830 and in the evening
- on the West Coast until about 0530, with a slight possibility of
- some openings through the night.
-
- Check 17 meters from 2230 to 0400, and 15 meters from 2300 to 0200.
- 12 meters may be open from 2330 to 0030, and on some days it may
- open 30 minutes earlier and close 90 minutes later.
-
- 10 meters does not look very good for this path, but there may be an
- opening between 2330 and 0100.
- NNNN
- /EX
-
-