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Hatanaka
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Data - Hatanaka Format Information at UNAVCO
OverviewYuki Hatanaka (hata gsi.go.jp) (GSI)
wrote and maintains rnx2crx and crx2rnx, which allows the user to
compress/decompress, respectively, a RINEX observation file into a smaller ASCII format. The
Hatanaka-compressed ASCII format version of a RINEX observation file is frequently used in conjuction
with the UNIX compress, zip, gzip or other
generalized compression utilities to create a very small file for Internet transfer.
At UNAVCOUNAVCO uses the Hatanaka compression strategy for all of its RINEX observation files. By IGS convention, a Hatanaka filename contain a 'd', rather than 'o', as the last filename character. Also by IGS convention, each file is then UNIX-compressed, adding a '.Z' extension to the filename.(Windows users: to UNIX-uncompress a '.Z' file, use a utility such as Winzip.) UNAVCO provides standard UNIX-compressed RINEX observation files for the past year (365 days), in addition to Hatanaka-UNIX compressed files. These are available from the UNAVCO FTP RINEX server. After UNIX-decompression, Hatanaka-decompression to an ordinary RINEX observation file is accomplished with crx2rnx, which is available at the GSI RNXCMP ftp site. Comments or questions about this page? Send e-mail to the Archive Staff (archive Last modified Tuesday, 23-Oct-2007 15:47:14 MDT |
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