MIRA cloud radar data from A-Train underflights with HALO (Radar reflectivity)

This sub-dataset provides the downward looking radar reflectivity profiles from the MIRA cloud radar collected during the NASA A-Train satellites overpasses conducted during the NARVAL-DEMO, NARVAL-1, NARVAL-2 and NAWDEX campaigns. The MIRA cloud radar is part of the remote sensing payload of the German research aircraft HALO (High Altitude and Long Range). The dataset include the radar reflectivity in the time frame +- 30 minutes around the A-Train overpass. The radar reflectivity was calibrated using laboratory measurements and the backscatter of the sea surface. The data is provided on the same grid like the lidar measurements from WALES (10.5281/zenodo.19318123). This repository of subsetted MIRA measurements is intended for long-term preservation and for use in future validation and process-studies related to aerosol–cloud–precipitation interactions and the remote-sensing capabilities of the A-Train satellites. Data Products Z The factor is calculated from the measured radar return power assuming the target is composed of liquid water droplets (K^2=0.93) scattering in the Rayleigh regime time seconds since 1970-01-01 00:00:00+0:00 alt Altitude grid above mean sea level lat Longitude of the platform lon Latitude of the platform Remarks All data is re-gridded to a constant altitude scale above mean sea level.本子数据集提供了MIRA云雷达（MIRA cloud radar）的下行雷达反射率廓线，这些数据采集自NARVAL-DEMO、NARVAL-1、NARVAL-2及NAWDEX科考任务期间NASA的A-Train卫星（A-Train）过境时段。MIRA云雷达是德国研究飞机HALO（高空远程研究飞机，High Altitude and Long Range）遥感有效载荷的组成部分。本数据集涵盖A-Train卫星过境前后±30分钟时段内的雷达反射率数据。 雷达反射率已通过实验室测量与海面后向散射完成定标。本数据与WALES激光雷达（WALES）的测量数据采用同一网格（10.5281/zenodo.19318123）。此子集化MIRA测量数据集旨在实现长期保存，并可用于未来与气溶胶-云-降水相互作用、A-Train卫星遥感能力相关的验证与过程研究。 数据产品 Z：该因子由实测雷达回波功率计算得到，假设目标为瑞利散射区的液态水滴（K²=0.93） time：距1970-01-01 00:00:00+0:00的秒数 alt：相对于平均海平面的高度网格 lat：观测平台的经度 lon：观测平台的纬度 备注 所有数据均已重网格化至相对于平均海平面的恒定高度标尺。