Message-ID: <3A23BB65.13CAB0C@gsi-mc.go.jp> Date: Tue, 28 Nov 2000 23:04:22 +0900 From: Yuki Hatanaka Reply-To: hata@gsi-mc.go.jp To: igsmail@igscb.jpl.nasa.gov Subject: [IGSMAIL-3115]: update of RINEX compression programs Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 28 Nov 06:02:34 PST 2000 Message Number 3115 ****************************************************************************** Author: Yuki Hatanaka Dear colleagues, This is an announcement of the release of the new version (2.4.0) of the RINEX compression programs. In this release, nothing is changed on usage and results of the programs, but the running speed is very much improved. (The result of benchmark test is attached below.) This is achieved only by replacing an inefficient function "sprintf" with "atoi" or "atol". The change from the former version (2.3beta) is minimal to minimize the possibility to bring bugs into the programs. The binary files for LINUX, HP-UX, SUN Solaris, DEC UNIX, Windows 95/98 are available from following address together with source codes. ftp://terras.gsi-mc.go.jp/pub/software/RNXCMP_2.4.0/ (Remark: GSI's domain name "gsi-me.go.jp" will be changed to "gsi.go.jp" from January.) Most of the users of the former version only need to replace the two binaries RNX2CRX and CRX2RNX. If you are using machines other than the above, the source code can be compiled by using ANSI C compiler. See docs/README file in the Since this update is not for fixing bugs, the former programs are still valid to use. At current, the ftp archive of IGSCB contains the former version. I recommend to replace them with the newer ones after appropriate procedure. Best Regards, Yuki ------------------------------------------------- HATANAKA,Yuki, Geographical Survey Institute e-mail : hata@gsi-mc.go.jp ------------------------------------------------- -------------------------------------------------------- Comparison of running time (2.3beta and 2.4.0) data : zimm2240.99o (1 Hz sampling, 70458749 byte) (1) compression: RNX2CRX zimm2240.99o 2.3beta 2.4.0 (ratio) LINUX2.2.14 (Pentium 400MHz) 49.30sec 22.09sec (44.8%) HPUX10.20 (236MHz) 59.74 24.72 (41.4%) SunOS 5.5.1 (167MHz) 72.00 36.00 (50.0%) LINUX on DEC ALPHA (600MHz) 39.79 15.99 (40.2%) DEC OSF1 V4.0 (600MHz) 39.630 10.413 (26.3%) Windows98 (Pentium 233MHz) 178.89 84.97 (47.5%) (2) uncompression: CRX2RNX zimm2240.99d 2.3beta 2.4.0 (ratio) LINUX2.2.14 (Pentium 400MHz ) 55.58sec 37.16sec (66.9%) HPUX10.20 (236MHz) 58.43 40.75 (69.7%) SunOS 5.5.1 (167MHz) 108.00 94.00 (87.0%) LINUX on DEC ALPHA (600MHz) 38.58 23.37 (60.6%) DEC OSF1 V4.0 (600MHz) 38.093 22.602 (59.3%) Windows98 (Pentium 233MHz) 368.99 137.75 (37.3%) --------------------------------------------------------