Re: Some non-Io-A from tonight March 09 2025
|
Very nice non-Io-A, Richard.
toggle quoted message
Show quoted text
The increasing frequency circa 2244 to 2252 UTC is interesting. That may say more about the ionosphere than the arc shape. Non-Io-A is always vertex late (negative freq drift). Non-Io-B is RCP and has a positive freq drift -- but it would be very strange, albeit not impossible, to see non-Io-B emission way over in the non-Io-A zone. Most likely that positive rate was due to ionospheric effects. Sometimes the emission can appear to have drift rate opposite of what's expected across a MHz or three if ionospheric dynamics decide to join the party. I suspect that's what's happening here. When the analysis is zoomed out to a half hour or more and to 10 MHz bandwidth or more, then the true arc shape becomes more apparent. -- Dave On 3/9/25 21:31, Richard Gray via groups.io wrote:
I think this is classified as non-Io-A. This is from earlier tonight. |
Dave Typinski