--------------------------------------------------------------------------------
 RTKLIB: An Open Source Program Package for GNSS Positioning
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OVERVIEW
RTKLIB is an open source program package for standard and precise positioning
with GNSS (global navigation satellite system). RTKLIB consists of a portable
program library and several APs (application programs) utilizing the library.
The features of RTKLIB are:
(1) It supports standard and precise positioning algorithms with:
 
 GPS, GLONASS, Galileo, QZSS, BeiDou and SBAS
 
(2) It supports various positioning modes with GNSS for both real-time- and
 post-processing:
 
 Single, DGPS/DGNSS, Kinematic, Static, Moving-Baseline, Fixed,
 PPP-Kinematic, PPP-Static and PPP-Fixed.
 
(3) It supports many standard formats and protocols for GNSS:
 
 RINEX 2.10,2.11,2.12 OBS/NAV/GNAV/HNAV/LNAV/QNAV, RINEX 3.00,3.01,3.02
 OBS/NAV,RINEX 3.02 CLK,RTCM ver.2.3,RTCM ver.3.1 (with amendment 1-5),
 RTCM ver.3.2, BINEX, NTRIP 1.0, NMEA 0183, SP3-c, ANTEX 1.4, IONEX 1.0,
 NGS PCV and EMS 2.0.
 
(4) It supports several GNSS receivers' proprietary messages:
 
 NovAtel: OEM4/V/6,OEM3,OEMStar,Superstar II, Hemisphere: Eclipse,Crescent,
 u-blox: LEA-4T/5T/6T, SkyTraq: S1315F, JAVAD GRIL/GREIS, Furuno
 GW-10-II/III and NVS NV08C BINR.
 
(5) It supports external communication via:
 
 Serial, TCP/IP, NTRIP, local log file (record and playback) and FTP/HTTP
 (automatic download).
 
(6) It provides many library functions and APIs (application program
 interfaces):
 
 Satellite and navigation system functions, matrix and vector functions,
 time and string functions, coordinates transformation, input and output
 functions, debug trace functions, platform dependent functions,
 positioning models, atmosphere models, antenna models, earth tides models,
 geoid models, datum transformation, RINEX functions, ephemeris and clock
 functions, precise ephemeris and clock functions, receiver raw data
 functions, RTCM functions, solution functions, Google Earth KML converter,
 SBAS functions, options functions, stream data input and output functions,
 integer ambiguity resolution, standard positioning, precise positioning,
 post-processing positioning, stream server functions, RTK server
 functions, downloader functions.
 
(7) It includes the following GUI (graphical user interface) and CUI
 (command-line user interface) APs.
 
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 Function GUI AP CUI AP
 --------------------------------------------------------------------------
 (a) AP Launcher RTKLAUNCH -
 (b) Real-Time Positioning RTKNAVI RTKRCV
 (c) Communication Server STRSVR STR2STR
 (d) Post-Processing Analysis RTKPOST RNX2RTKP
 (e) RINEX Converter RTKCONV CONVBIN
 (f) Plot Solutions and Obs Data RTKPLOT -
 (g) Downloder of GNSS Data RTKGET -
 (h) NTRIP Browser NTRIPSRCBROWS -
 --------------------------------------------------------------------------
(8) All of the executable binary APs for Windows are included in the package as
 well as whole source programs of the library and the APs.
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SYSTEM REQUIEREMENTS
The executable binary GUI and CUI APs included in the package require Microsoft
Windows environment. On the other OS or environment, you have to compile and
build CUI APs by yourself.
All of the library functions and APIs were written in ANSI C (C89). The library
internally uses winsock and WIN32 thread for Windows with the compiler option
-DWIN32 and the standard socket and pthread (POSIX thread) for Linux/UNIX
without any option. By setting the compiler option -DLAPACK or -DMKL, the
library uses LAPACK/BLAS [36] or Intel MKL for fast matrix computation. The CUI
APs were written in ANSI C. The library and CUI APs can be built on many
environments like gcc on Linux. The GUI APs were written in C++ and utilize
Embarcadero/Borland VCL (visual component library) for GUI toolkits. All of the
executable binary APs in the package were built by Embarcadero C++ builder XE2
Starter Edition on Windows 7.
The executable GUI APs were tested on Windows 7 (64bit). The CUI APs were also
built and tested on Ubuntu 11.04 Linux and x86 CPU.
Notes:
Previous versions of RTKLIB until ver. 2.4.1 were built by a free edition of
Borland C++ (Turbo C++ 2006). Turbo C++, however, is no longer supported in
ver. 2.4.2 because of type incompatibility problem of GUI strings between
ver.2.4.2 and the previous ones.
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LICENSE
The RTKLIB software package is distributed under the following BSD 2-clause
license (http://opensource.org/licenses/BSD-2-Clause) and additional two
exclusive clauses. Users are permitted to develop, produce or sell their own
non-commercial or commercial products utilizing, linking or including RTKLIB as
long as they comply with the license.
 Copyright (c) 2007-2013, T. Takasu, All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this
 list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this
 list of conditions and the following disclaimer in the documentation and/or
 other materials provided with the distribution.
- The software package includes some companion executive binaries or shared
 libraries necessary to execute APs on Windows. These licenses succeed to the
 original ones of these software. 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Notes:
Previous versions of RTKLIB until ver. 2.4.1 had been distributed under GPLv3
(http://www.gnu.org/licenses/gpl-3.0.en.html) license.
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DIRECTORY STRUCTURE OF PACKAGE
 rtklib_<ver>
 ./src source programs of RTKLIB library *
 ./rcv source programs depending on GPS/GNSS receivers *
 ./bin executable binary APs and DLLs for Windows
 ./data sample data for APs
 ./app build environment of APs *
 ./rtknavi RTKNAVI (GUI) *
 ./rtknavi_mkl RTKNAVI_MKL (GUI) *
 ./strsvr STRSVR (GUI) *
 ./rtkpost RTKPOST (GUI) *
 ./rtkpost_mkl RTKPOST_MKL (GUI) *
 ./rtkplot RTKPLOT (GUI) *
 ./rtkconv RTKCONV (GUI) *
 ./srctblbrows NTRIP Browser (GUI) *
 ./rtkget RTKGET (GUI) *
 ./rtklaunch RTKLAUNCH (GUI) *
 ./rtkrcv RTKRCV (CUI) *
 ./rnx2rtkp RNX2RTKP (CUI) *
 ./pos2kml POS2KML (CUI) *
 ./convbin CONVBIN (CUI) *
 ./str2str STR2STR (CUI) *
 ./appcmn common routines for GUI APs *
 ./icon icon data for GUI APs *
 ./lib library genration environment *
 ./test test programs and data *
 ./util utilities *
 ./doc document files
 
 * not included in the binary package rtklib_<ver>_bin.zip
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MANUAL
Refer rtklib_<ver>/doc/manual_<ver>.pdf.
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SUPPORT INFORMATION
Refer http://www.rtklib.com/rtklib_support.htm.
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HISTORY
 ver.1.0 2007年01月25日 new release
 ver.1.1 2007年03月20日 add rnx2rtkp_gui, fix bugs, improve performance
 ver.2.1.0 2008年07月15日 refactored, add applications
 ver.2.1.1 2008年10月19日 fix bugs
 ver.2.2.0 2009年01月20日 add stream.c,rtksvr.c,preceph.c in src
 add rtknavi,rtkpost_mkl,srctblbrows,strsvr,str2str in app
 ver.2.2.1 2009年05月17日 see relnotes_2.2.1.txt
 ver.2.2.2 2009年09月07日 see relnotes_2.2.2.txt
 ver.2.3.0 2009年12月17日 see relnotes_2.3.0.txt
 ver.2.4.0 2010年08月08日 see relnotes_2.4.0.pdf
 ver.2.4.1 2011年06月01日 see relnotes_2.4.1.htm
 ver.2.4.2 2013年04月19日 see relnotes_2.4.2.htm
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