If you click a part of the spectrograms below, maps of GPS-TEC ROTI during the corresponding 1 hour period will appear (every 5 min).
A movie of the ROTI data is also available.  6-days Prediction of Toropospheric Duct
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Sarobetsu, Hokkaido:  Status,  Zoom-in             | Sugadaira, Nagano:  Status,  Zoom-in             | Oarai, Ibaraki:  Status,  Zoom-in             |
Chofu, Tokyo:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/CF2/2024/07/CF2_20240727_QL_2P_BlackBG.png) | Kure, Hiroshima:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/KUR/2024/07/KUR_20240727_QL_2P_BlackBG.png) | Onna-North, Okinawa:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/ONA/2024/07/ONA_20240727_QL_2P_BlackBG.png) |
Sendai, Miyagi:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/SND/2024/07/SND_20240727_QL_2P_BlackBG.png) | Kyoto, Kyoto:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/KYO/2024/07/KYO_20240727_QL_2P_BlackBG.png) | Kirishima, Kagoshima:  Status,  Zoom-in
![](http://gwave.cei.uec.ac.jp/~vor/plot_product/QL_1D_black/KAG/2024/07/KAG_20240727_QL_2P_BlackBG.png) |