Riometer data for: Data-based optimization of a simple shortwave fadeout absorption model

Level 3 1-second data files for the Natural Resources Canada (NRCan) riometer stations (https://www.spaceweather.gc.ca/data-donnee/ionosphere/index-en.php#hf). Data fields include time, observed voltage (V), number of samples per second, voltage range per second (V), calibration flag (0-data period, 1-calibration period), quiet day curve voltage (V), absorption (dB), quality flag (1-good quality).