>>27 NMEA出力が1Hz動作なのはUblox社のEVK-M8Uのマニュアルに書いてあります。 https://www.u-blox.com/sites/default/files/EVK-M8U_UserGuide_%28UBX-15023994%29.pdf 4.2Recommended configurationFor optimum navigation performance, the recommended navigation rate configuration is as follows: The default DR/GNSS-fused navigation solution update rate of 1 Hz is recommended. You can set the navigation update rate with the message UBX-CFG-RATE. (In this mode, navigation rates up to 30 Hz are also available from the UBX-HNR-PVT message.)