GOES-16 cloud-motion wind and ASCAT ocean surface wind data for the article "Evolution of an atmospheric Kármán vortex street from high-resolution satellite winds: Guadalupe Island case study"

This repository contains GOES-16 cloud-motion winds and ASCAT ocean surface winds derived for and analysed in the article "Evolution of an atmospheric Kármán vortex street from high-resolution satellite winds: Guadalupe Island case study". <strong>GOES-16 Local Cloud-Motion Vectors</strong> Data in two ASCII text files: <em>raw5x5g16b2_2018d129_1437z_2232z_north.txt</em> and <em>raw5x5g16b2_2018d129_1437z_2232z_south.txt</em>, with the former containing data for the upper half and the latter for the lower half of the study domain between ~26^oN and ~29.5^oN. Both files include 96 records, each record corresponding to a specific 5-minute time interval between 14:37 UTC and 22:32 UTC on 9 May 2018—9 May is day of year 129. The start and end times are given at the beginning of each record in YYYYDDDHHMM format, where Y is year, D is day of year, H is hour, and M is minute. For example, the first record contains data between 14:37 UTC and 14:42 UTC, as indicated by the start and end times of 20181291437 and 20181291442. Then follows the four column headers LAT LON SPD DIR, corresponding to latitude (degree), longitude (degree), wind speed (m/s), and wind direction (meteorological convention, degree north), respectively—note that no cloud-top height/pressure value was calculated for the wind vectors. Each subsequent line is a single GOES-16 local cloud-motion vector, derived from 5x5-pixel band 2 (0.64 micron visible red band) image templates, which represent an area of ~2.5x2.5 km² at the subsatellite point. <strong>MODIS–GOES-16 3D Cloud-Motion Vectors</strong> Data in two netCDF files: <em>MOD.A2018129.1810-75_ABI_CONUS_band_02_goes16.nc</em> and <em>MYD.A2018129.2120-75_ABI_CONUS_band_02_goes16.nc</em>, which correspond to the MODIS Terra and MODIS Aqua overpasses, respectively. These joint MODIS–GOES-16 wind retrievals were derived using ~8x8 km² red band image templates sampled every 2 km. The data files are self-explanatory, but the variables "lat", "lon", "V_3D", and "H_3D" provide the latitude (degree), longitude (degree), the [east-west, north-south] wind components (m/s), and the geometric stereo height (m) for each wind retrieval. <strong>ASCAT Ocean Surface Wind Vectors</strong> Data in two netCDF files: <em>ascat_20180509_030000_metopa_59945_srv_o_063_ovw_new.nc</em> and <em>ascat_20180509_040000_metopb_29259_srv_o_063_ovw_new.nc</em>, which correspond to the MetOp-A and MetOp-B overpasses, respectively. These ASCAT ocean surface retrievals are stress-equivalent winds at 10 m height, given on a 6.25-km grid. The data files are self-explanatory, but the variables "lat", "lon", "wind_speed", and "wind_dir" provide the latitude (degree), longitude (degree), the wind speed (m/s), and the wind direction (oceanographic convention, degree north) for each wind retrieval. <em>Note that wind direction follows the oceanographic convention and refers to the direction towards which the wind blows (equivalent to meteorological wind direction minus 180^o)!</em>本数据集仓库包含为论文《基于高分辨率卫星风场的大气卡门涡街演化：瓜达卢佩岛案例研究》（*Evolution of an atmospheric Kármán vortex street from high-resolution satellite winds: Guadalupe Island case study*）所生成并分析的GOES-16云运动风场与ASCAT海洋表面风场数据。 **GOES-16局地云运动矢量（GOES-16 Local Cloud-Motion Vectors）** 数据存储于两个ASCII文本文件：`raw5x5g16b2_2018d129_1437z_2232z_north.txt`与`raw5x5g16b2_2018d129_1437z_2232z_south.txt`，前者包含研究区域北纬26°至29.5°之间上半区域的数据，后者包含下半区域的数据。两个文件均包含96条记录，每条记录对应2018年5月9日（当年第129天）协调世界时（UTC）14:37至22:32之间的一个5分钟时间间隔。每条记录的开头以`YYYYDDDHHMM`格式标注起始与结束时间，其中`Y`为年份、`D`为当年第几日、`H`为小时、`M`为分钟。例如，第一条记录的起始与结束时间标注为`20181291437`与`20181291442`，对应14:37至14:42 UTC的时段。记录随后为四列表头：`LAT`、`LON`、`SPD`、`DIR`，分别对应纬度（单位：度）、经度（单位：度）、风速（单位：m/s）与风向（遵循气象惯例，单位：度，以正北为基准）。*请注意：本风场矢量未计算云顶高度/气压值。* 每条后续行代表一个单独的GOES-16局地云运动矢量，其基于5×5像素的第2波段（0.64微米可见光红波段）图像模板生成，在星下点处对应的覆盖面积约为2.5×2.5 km²。 **MODIS–GOES-16三维云运动矢量（MODIS–GOES-16 3D Cloud-Motion Vectors）** 数据存储于两个netCDF文件：`MOD.A2018129.1810-75_ABI_CONUS_band_02_goes16.nc`与`MYD.A2018129.2120-75_ABI_CONUS_band_02_goes16.nc`，分别对应MODIS Terra与MODIS Aqua卫星的过境数据。这类联合MODIS–GOES-16风场反演产品基于每2 km采样的8×8 km²红波段图像模板生成。数据文件内容直观易懂，其中变量`lat`、`lon`、`V_3D`与`H_3D`分别对应每条风场反演结果的纬度（单位：度）、经度（单位：度）、[东西向、南北向]风速分量（单位：m/s）以及几何立体高度（单位：m）。 **ASCAT海洋表面风矢量（ASCAT Ocean Surface Wind Vectors）** 数据存储于两个netCDF文件：`ascat_20180509_030000_metopa_59945_srv_o_063_ovw_new.nc`与`ascat_20180509_040000_metopb_29259_srv_o_063_ovw_new.nc`，分别对应MetOp-A与MetOp-B卫星的过境数据。这类ASCAT海洋表面反演产品为10米高度处的应力等效风场，网格分辨率为6.25 km。数据文件内容直观易懂，其中变量`lat`、`lon`、`wind_speed`与`wind_dir`分别对应每条风场反演结果的纬度（单位：度）、经度（单位：度）、风速（单位：m/s）以及风向（遵循海洋学惯例，单位：度，以正北为基准）。*请注意：风向遵循海洋学惯例，指风的来向（等同于气象风向减去180°）！*