div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=effects-of-pronounced-electron-content-variations-on-doppler-shift-at-low-elevationshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Effects of Pronounced Electron-Content Variations on Doppler Shift at Low Elevations loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsmxreader031viewer20220204055750682f1a28ab0f07aefe19html5thumbnails1jpg width=140 height=200 divp© 1965 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=effects-of-pronounced-electron-content-variations-on-doppler-shift-at-low-elevationshtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Effects of Pronounced Electron-Content Variations on Doppler Shift at Low Elevations loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsmxreader031viewer20220204055750682f1a28ab0f07aefe19html5thumbnails2jpg width=140 height=200 divp© 1965 Nature Publishing Grouppdiv