div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: nonstopsystemscom · 2011-10-02 · vertically so that it will be scattered and reflected downward by the ionosphere MUFs can easily be determined using ionospheric sounding or src=https:reader033vdocumentsmxreader033viewer20220417145e49f653ef73ad212c2b0e14html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: nonstopsystemscom · 2011-10-02 · vertically so that it will be scattered and reflected downward by the ionosphere MUFs can easily be determined using ionospheric sounding or src=https:reader033vdocumentsmxreader033viewer20220417145e49f653ef73ad212c2b0e14html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: nonstopsystemscom · 2011-10-02 · vertically so that it will be scattered and reflected downward by the ionosphere MUFs can easily be determined using ionospheric sounding or src=https:reader033vdocumentsmxreader033viewer20220417145e49f653ef73ad212c2b0e14html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: nonstopsystemscom · 2011-10-02 · vertically so that it will be scattered and reflected downward by the ionosphere MUFs can easily be determined using ionospheric sounding or src=https:reader033vdocumentsmxreader033viewer20220417145e49f653ef73ad212c2b0e14html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: nonstopsystemscom · 2011-10-02 · vertically so that it will be scattered and reflected downward by the ionosphere MUFs can easily be determined using ionospheric sounding or src=https:reader033vdocumentsmxreader033viewer20220417145e49f653ef73ad212c2b0e14html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdiv