Eredar measurements of Halema'uma'u lava lake level (NERC Grant NE/N009312/1)

Surface level measurements of the Halema'uma'u lava lake, Hawaii. Surface level was measured from a site at the crater rim (19.40452 N 155.27944 W 1125 M a.s.l) using the Eredar radar system, a ground-based X-band FMCW radar (described in detail here: https://doi.org/10.1029/2018GL079177). Due to technical problems, the radar did not acquire continuously throughout its deployment. The dataset contains three blocks of successful continuous measurement periods (all times in UTC): 10 Jan 22:18 -> 11 Jan 08:46 11 Jan 21:24 -> 12 Jan 22:49 14 Jan 20:27 -> 14 Jan 23:01 Measurements were taken at a rate of ~1 Hz, using a 20 ms 400 MHz bandwidth Linear Frequency Modulated chirp centred at 10.25 GHz.针对夏威夷哈尔埃玛乌玛乌（Halema'uma'u）熔岩湖的地表高程测量数据。本次测量依托火山口边缘的测点完成，测点坐标为北纬19.40452°、西经155.27944°，海拔1125米，采用Eredar雷达系统——一款地基X波段调频连续波（FMCW）雷达，详细技术说明参见：https://doi.org/10.1029/2018GL079177。受技术故障影响，该雷达在部署期间未能实现连续数据采集。本数据集包含三段成功获取的连续测量时段，所有时间均采用协调世界时（UTC）：1月10日22:18至1月11日08:46；1月11日21:24至1月12日22:49；1月14日20:27至1月14日23:01。本次测量的采样率约为1赫兹，采用中心频率为10.25 GHz、带宽400 MHz、时长20毫秒的线性调频啁啾信号。