The filenames in the HSOS public access area all contain information about the type of image, the location of spectra, the date of observation, and the number of active area, order of distribution.
All filenames end with the extension .dat.
How to obtain HSOS images through the Internet Images from the BBSO archive can be obtained by using anonymous FTP in the usual way. Under the directory hrdata, you can see directories 1998,1999, tab and so on. You can also access the FTP archive using the World Wide Web. Image data are under directory Observation Data. Once your browser is properly configured, you have no difficulty accessing an image data or text file by click on the name of the file you want to get.