TCSP ER-2 DOPPLER RADAR (EDOP) V1

The TCSP ER-2 DOPPLER RADAR (EDOP) dataset was collected by the ER-2 Doppler radar (EDOP), which is an X-band (9.6 GHz) Doppler radar mounted in the nose of the ER-2 aircraft that provides vertically profiled reflectivity and Doppler velocity at aircraft nadir along the flight track. The instrument has two fixed antennas, one pointing at nadir and the second pointing approximately 33 degrees ahead of nadir. The beam width of the antenna is 3 degree in the vertical and horizontal directions which, for a 20 km altitude, yields a nadir footprint at the surface of 1 km. Each Antenna measures the doppler velocity, doppler spectral width, and reflectivity factor. Doppler velocities provide a measure of the pulse volume-weighted hydrometer motion (hydrometer fallspeed + air motion). Vertical air motion can be calculated from the nadir beam by removing the fallspeed contribution with an approximation. The linear depolarization ratio (the ratio of the cross-polar to the co-polar reflectivites) can be measured along the forward beam. EDOP provides measurements from a forward pointing beam that is used in combination with the nadir beam for estimating the along-track winds. The TCSP mission collected data for research and documentation of cyclogenesis, the interaction of temperature, humidity, precipitation, wind and air pressure that creates ideal birthing conditions for tropical storms, hurricanes and related phenomena. The goal of this mission was to help us better understand how hurricanes and other tropical storms are formed and intensify.

TCSP ER-2 DOPPLER RADAR (EDOP) 数据集由ER-2多普勒雷达（EDOP）收集而成，该雷达为一部安装于ER-2飞机机头的X波段（9.6 GHz）多普勒雷达，可沿飞行轨迹提供垂直剖面反射率和飞机下方的多普勒速度。该仪器装备有两个固定天线，一个指向下方，另一个大致指向下方前方33度。天线的波束宽度在垂直和水平方向均为3度，对于20公里的高度，在地面形成1公里的下方足迹。每个天线测量多普勒速度、多普勒频谱宽度和反射率因子。多普勒速度提供了脉体积加权的水汽运动（水汽下降速度加空气运动）的度量。垂直空气运动可以通过下视波束计算得出，通过移除下降速度的贡献进行近似。沿前向波束可以测量线性去极化率（交叉极化与同极化反射率之比）。EDOP提供了从前视波束的测量数据，该数据与前视波束结合用于估计沿轨迹风速。TCSP任务收集了数据，以研究和记录气旋生成过程，包括温度、湿度、降水、风速和气压的相互作用，这些因素创造了热带风暴、飓风及相关现象的理想孕育条件。此次任务的目标是帮助我们更好地理解飓风和其他热带风暴的形成和增强过程。