@proceedings {696,
	title = {Broadband Recordings from Medium Wave DXers Could Support Solar Eclipse Science},
	year = {2023},
	month = {03/2023},
	publisher = {HamSCI},
	address = {Scranton, PA},
	abstract = {<p>Medium wave DXers monitor the AM broadcast band (535-1705kHz) to receive distant radio stations, generally between sunset and sunrise, in order to take advantage of favorable ionospheric conditions then.\&nbsp; Historically, these DXers have been aware of similarly favorable reception conditions that occur during solar eclipses, and during the 2017 solar eclipse, a number of them recorded the entire AM broadcast band using software defined radios (SDRs).\&nbsp; During the upcoming annular and total solar eclipses, it is proposed to suggest to such DXers that their pursuit of distant radio stations be done in such a way as to make their recorded IQ files of optimum use to propagation researchers, both from HamSCI and from elsewhere, by documenting such things as receiver, software\&nbsp; and antenna settings,\&nbsp; and by making sure that timestamps in their data are as accurate as possible.\&nbsp; DXers could also be encouraged\&nbsp; to make additional recordings of sunrise and sunset conditions in order to support HamSCI scientific goals.\&nbsp; Because some DXers use SDRs with system clocks locked to GPS, the data from such SDRs could be useful as a lower frequency adjunct to data gathered from Grape v2, especially if Doppler variation of specific broadcaster{\textquoteright}s carriers could be converted to the audio format used by Grape v2, before further processing.\&nbsp; IQ data recorded during the eclipse could be gathered together and archived by HamSCI for future researchers, such as was done for the 2017 eclipse.\&nbsp; The processing of such data to support present HamSCI scientific objectives could require significant volunteer effort, however.</p>
},
	author = {Nicholas Hall-Patch}
}
