如下图所示，单击Archive。
As shown in the figure below, click ‘Archive’.
对于初学者来说，GDAS数据是一个不错的选择，覆盖全球，常用于Hysplit的模拟。其它方面请按照自己的需求而定，主要就是时间区间及下载位置，这里只是一个示例。设定好之后，就可以单击‘FTP Data File’开始下载。
For beginners, GDAS data is a good choice as it provides global coverage and is commonly used for HYSPLIT simulations. Other settings should be configured based on your specific needs, mainly the time range and download location—this is just an example. Once everything is set, you can click "FTP Data File" to start the download.
当出现‘FTP complete’，就表示下载完成了，此过程下载的文件名为‘gdas1.may24.w4’，位置在working文件夹。这就是一个简单的FTP下载过程。
When "FTP complete" appears, it means the download has finished. The downloaded file is named "gdas1.may24.w4" and is located in the ‘working’ folder. This is a simple FTP download process.
HRRR(High-Resolution Rapid Refresh)
High-Resolution: HRRR is a high-resolution weather model, meaning it operates on a fine spatial grid to capture detailed weather patterns. Specifically, it uses a 3-km horizontal resolution, allowing it to resolve smaller-scale phenomena like thunderstorms or local wind patterns that coarser models (e.g., GFS at 0.25-degree resolution) might miss.
Rapid Refresh: HRRR is updated frequently—every hour—with new data assimilation and forecasts. This rapid update cycle makes it ideal for short-term, real-time weather predictions, typically out to 18 hours (with some experimental runs extending to 48 hours).
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