9. I downloaded CORS data but it does not work with my reduction software. What is wrong with the data ?

The CORS data has been compressed to save space. When it is retrieved via FTP it must be treated as if it is binary data and it must be uncompressed. (WEB transfer software usually recognizes binary data and sets the proper mode.) Thus, before the transfer the user must set the transfer to binary mode (bin or binary, see answer 2). After the transfer, the data must be uncompressed using program gzip (see answer 6). After transfer and decompression, the file should be a readable ASCII file in RINEX format. If you cannot open the file and recognize numbers and words in the file then the transfer and decompression has not worked properly. If the file can be opened and read easily, then the reduction software may not be expecting a RINEX 2 file. Ensure that you are importing the data properly. If all else fails contact the manufacturer of your software.