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Distance Calculation Issue?
开云体育
All:?
While monitoring 30M APRS, I noticed a discrepancy in the distance calculated by YAAC between myself and VK5RR. The range should be approximately 10,500 miles, but YAAC showed 1,700 miles. I checked APRS-FI to see if VK5RR's position might be off, but it appeared
to be correct. YAAC did show the correct bearing which is 273 degrees.? ??
The distance for all other stations seems fine so not sure why the discrepancy for VK.?
Any ideas??
Tony -K2MO |
Greetings.
I'm looking through the code, and can't see anything obvious, other than the first '1' in the distance value is aligned with the left edge of the bearing pointer circle. I'm wondering if the leading text character simply didn't horizontally _fit_ in the panel containing the bearing pointer and the text above and below the pointer. To check this, if you see VK5RR show up again, could you look for the station entry in the View->Station/Object list table, and see what distance and bearing is displayed there? Note that if the text field in the table begins or ends with "...", it means the table column is too narrow to fit all the characters in the column, so you may have to widen the column by dragging the edge of the column header (just like you would resize a column in Microsoft Excel). Also, were you seeing any other Australians at the time? If so, were any of their distances truncated? Let me know what you find. Andrew, KA2DDO author of YAAC ________________________________________ From: [email protected] <[email protected]> on behalf of Tony via groups.io <73GUDDX@...> Sent: Friday, January 10, 2025 5:16 PM To: [email protected] Subject: [yaac-users] Distance Calculation Issue? All: While monitoring 30M APRS, I noticed a discrepancy in the distance calculated by YAAC between myself and VK5RR. The range should be approximately 10,500 miles, but YAAC showed 1,700 miles. I checked APRS-FI to see if VK5RR's position might be off, but it appeared to be correct. YAAC did show the correct bearing which is 273 degrees. The distance for all other stations seems fine so not sure why the discrepancy for VK. Any ideas? Tony -K2MO |
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