Normal view
PODCAST: This Week in Amateur Radio Edition #1324 β Full Version
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This Week in Amateur Radio
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PODCAST: This Week in Amateur Radio Edition #1324 β Truncated 1-hour version
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Ham Radio β Ham Events β Ham Reviews β Ham Links β Ham News
- Master Portable Operations: Reel POTA-ble Antenna Review
Master Portable Operations: Reel POTA-ble Antenna Review
PODCAST: This Week in Amateur Radio Edition #1323 β Full Version
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This Week in Amateur Radio
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Exploring Shortwave Radio Signals: A Peek into Non-Local Communications
PODCAST: This Week in Amateur Radio Edition #1322 β Full Version
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This Week in Amateur Radio
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PODCAST: This Week in Amateur Radio Edition #1321 β Full Version
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This Week in Amateur Radio
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PODCAST: This Week in Amateur Radio Edition #1321 β Truncated 1-hour version
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Copasetic Flow
- Antipodal HF Radiation: Or How Did TouCans Talk to Nighttime Australia and Japan after Sunrise in CO?
Antipodal HF Radiation: Or How Did TouCans Talk to Nighttime Australia and Japan after Sunrise in CO?
Β On one of the most interesting radio days of our recent camping trip, Project TouCans made QSOs with Australia, Japan, Columbia, and Argentina, all on the same day! The QSOs to Japan and Australia were made in the middle of their night. The Japan, Australia, and Columbia QSOs were all made in a sixteen minute window beginning with VK3YV at 12:40 UTC.
What was the Propagation Mode?
Chordal Modes Introduced with Villard
Finding Our Antipodal Point
To find the anitpoidal point, we can follow our longitude over the North (or South for that matter) where it will become the same longitude minus 180 degrees, or pi radians if that's the unit you prefer. You can see this in the diagram below where our longitude of about -107 degrees traced over the pole becomes about 73 degrees.
Meanwhile, our latitude above the equator will be used to find the same number of degrees below the equator:
37.82275 becomes -37.82275.
More precisely, we getΒ
37.822754Β°N 107.717935Β°W -> 37.822754Β°NΒ 72.282065Β°E
And our anitpodal is shown below near the 70 degrees East label.
Pretty excellent discussion of anitpodal points.
Conclusions for the moment
PODCAST: This Week in Amateur Radio Edition #1320 β Full Version
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This Week in Amateur Radio
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This Week in Amateur Radio
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