Magnetic pictures of the Gulf Stream and Kurosio as they seen by SWARM satellites

Six MATLAB/Octave data files (*.mat) are the output of two codes: myfilter_Gulf_Stream.m & myfilter_Kurosio.m. Each file containes three fileds:  x10, y10, and ogmf10; all  three have the same dimention. The x10 is 2D longitude, the y10 is 2D latitude, the ogmf10 is the filtered ocean generated magnetic field on 1.0 degree grid. The eaziest way to see the fields in Matlab/Octave is the comand contourf(x10,y10,ogmf10,10).  The files names containing 'gulfstream' are the Gulf Stream induced magnetic fields; the files with names starting with 'kurosio' are the inferred fild for the Kurosio current. Letter "A" in the name is for Alpha satellite, letter "C" is for Charlie satellite, letters "AC" denote combined two-satellite dataset. Number "430" means altitude in km. "202204"  is April 2022.  

The Matlab/Octave codes myfilter_Gulf_Stream.m & myfilter_Kurosio.m are filters to infer the field induced by the Gulf Stream and Kurosio

Three files "search_algorithm...." are the SWARM satellites data on regular grid. Again, Letter "A" in the name is for Alpha satellite, letter "C" is for Charlie satellite, letters "AC" denote combined two-satellite dataset. In Matlab/Octave the files can be read with a simple command  load "name".  Each file containes the following fields: bz, by, bx, sig, nem, lat, lon which are three components of the magnetic fields, the standard deviation,  number of data found by the search algoritn in each grid node,  latitude and longitude. To check the data do the following:   [X,Y]=meshgrid(lon,lat); contourf(X,Y,bz,10); colorbar

The land file containes two coordinates (xcst,ycst) of land masses. Command to read:  load land

A file M025Mask is a mask function, see (Golubev, 2012)  load M025mask

Kurosio_axis & Gulf_strea_axis are files containing coordinates of current's  axis

Figure 1,2,3 are .jpg files from the paper which is going to be submited to GRL:   Yury Golubev:  Magnetic pictures of the Gulf Stream and Kurosio as they seen by  SWARM satellites

六个MATLAB/Octave数据文件（*.mat）为两段代码myfilter_Gulf_Stream.m与myfilter_Kurosio.m的输出结果。每个文件均包含三个维度完全一致的字段：x10、y10与ogmf10。其中x10为二维经度场，y10为二维纬度场，ogmf10为1.0度网格下的滤波后海洋感应磁场。在MATLAB/Octave中查看该场的最简方式为执行命令contourf(x10,y10,ogmf10,10)。文件名含“gulfstream”的文件对应墨西哥湾流（Gulf Stream）感应磁场；以“kurosio”开头的文件则对应黑潮（Kurosio）的推断磁场。文件名中的字母“A”代表阿尔法卫星（Alpha satellite），字母“C”代表查理卫星（Charlie satellite），“AC”表示双卫星组合数据集；“430”代表卫星轨道高度为430千米，“202204”代表2022年4月。

用于生成上述数据的MATLAB/Octave代码myfilter_Gulf_Stream.m与myfilter_Kurosio.m，为用于推断墨西哥湾流与黑潮感应磁场的滤波程序。

三个名为“search_algorithm……”的文件为规则网格下的SWARM卫星（SWARM satellites）观测数据。同样，文件名中的“A”代表阿尔法卫星，“C”代表查理卫星，“AC”表示双卫星组合数据集。在MATLAB/Octave中可通过简单命令load "name"读取该类文件。每个文件包含如下字段：bz、by、bx、sig、nem、lat、lon，分别对应磁场三分量、标准差、搜索算法在各网格节点检索到的有效数据点数、纬度与经度。验证数据的示例命令为：[X,Y]=meshgrid(lon,lat); contourf(X,Y,bz,10); colorbar

陆地数据文件包含陆地轮廓的两个坐标场xcst与ycst，读取命令为load land。

M025Mask为掩膜函数文件，相关说明参见(Golubev, 2012)，读取命令为load M025mask。

Kurosio_axis与Gulf_strea_axis文件包含对应海流主轴的坐标信息。

图1、图2、图3为即将提交给《地球物理研究快报》(Geophysical Research Letters，简称GRL)的论文配图，论文标题为Yury Golubev: Magnetic pictures of the Gulf Stream and Kurosio as they seen by SWARM satellites（尤里·戈卢别夫：SWARM卫星观测到的墨西哥湾流与黑潮磁影像）。