Data Help with Data GPS/GNSS Data GPS/GNSS Data Access Methods Real-time GPS/GNSS Data Data Management Overview Derived Data Products Associated Data Products GPS/GNSS File Server Layout File Server Access Examples Data Formats Data Operations

Hatanaka Format Information at UNAVCO


Overview

Yuki Hatanaka (hatagsi.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 UNAVCO

UNAVCO 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 GPS/GNSS File server. After UNIX-decompression, Hatanaka-decompression to an ordinary RINEX observation file is accomplished with crx2rnx. See also Hatanaka compression/decompression.

 

Last modified: 2021-07-20  17:01:44  America/Denver