영상레이더 간섭기법 강원대학교 지구물리학과 이훈열 교수 2006 년 2 학기 대학원 강의

강의 계획 매주 수요일 3-6 시 강의 내용 C (cygwin, gcc, vi, gnuplot) FFT (1D and 2D, convolution, correlation) SAR (eSAR Processor) InSAR (eInSAR Processor) 컴퓨터 실습 위주의 강의

Cygwin Linux-like environment for Windows Why cygwin? Free Windows applications Website:

Cygwin Setup Setup.exe Install from the internet Install for All Users Root directory: f:\cygwin Default text file type: Unix/binary [RECOMMENDED] Select FTP site Package selection: +Devel -> gcc (GCC C compiler) +Editors -> vim (a text editor) +Graphics -> gnuplot +Shells -> bash (c shell) +System -> procps (top: system monitoring) +Text -> more (file viewer) +X11 -> xorg-x11-base

Cygwin Setup Text Editor: WordPad Edit.bash_profile # Set PATH so it includes user's private bin if it exists if [ -d "${HOME}/bin" ] ; then PATH=./:${HOME}/bin:${PATH} fi Edit.bashrc alias dir='ls -alF ‘ Try linux commands cd, ls, man, dir, cc, pwd, top, startx

gnuplot test Try gnuplot cygwin> startx & In X-terminal, cygwinx> gnuplot gnuplot> plot sin(x) gnuplot> plot [-5:5] [-2:2] cos(x) gnuplot> splot cos(x*y) gnuplot> replot sin(x*y) gnuplot> help gnuplot> help plotting

Gcc – Hello World Text editor: WordPad Edit hello.c #include main() { printf(“Hello World!!\n”); } Compile and run cygwin>cc –o hello hello.c cygwin> hello Hello World!!

Gcc & gnuplot Edit plot1.c #include main() { FILE *fp; int i; double pi; pi=4.*atan(1.); fp=fopen(“plot1.dat”, “w”); for(i=0; i<100; i++) { fprintf(fp, “%d %lf\n”, i, sin(2*pi*i/50)); } fclose(fp); } Compile, run and plot cygwin>cc –o plot1 plot1.dat cygwin>startx & cygwinx>gnuplot gnuplot>plot “plot1.dat” w l gnuplot>replot sin(2*pi*x/50)