Fortran 90 routines for the BYU-MERS "SIR" image format The BYU-MERS "sir" image format was developed by the Brigham Young University (BYU) Microwave Earth Remote Sensing (MERS) research group to store images of the earth along with the information required to earth-locate the image pixels. Note that these routines use the SIR-standard pixel address from 1 to N. (1,1) is in the lower left of the image of a SIR File. For an input location of pixel (1,1) the Lat,Lon values returned by pixtolatlon correspond to the location of the lower-left corner of the (1,1)th pixel. This directory contains several programs which illustrate reading and writing BYU SIR files. The programs include utilities to convert the SIR files into other file formats and to compute SIR "images" of the lat/lon of each pixel in an other SIR image. Fortran 90-specific routines are in lib/ The fortran 77 routines (excluding the SIREZ.f/SIREZ.inc code) are also required. The SIREZ_90.f file contains f90 interface routines which simplify calling of the sir fortran routines in fortran 90 code. Illustrations of how to call the various routines are in this directory and use the library routines. Generally, it is recommended that header info be initialized from a previously read in sir file and modified as necessary. If you have any questions, please contact me. ======================================================================== Dr. David G. Long long@ee.byu.edu Director, BYU Center for Remote Sensing http://www.cers.byu.edu/ Professor, Electrical and Computer Eng. Dept. http://www.ee.byu.edu/ Brigham Young University http://www.byu.edu/ 459 Clyde Building voice: 801-422-4383 Provo, Utah 84602 fax: 801-422-0201 Microwave Earth Remote Sensing (MERS) Lab: http://www.mers.byu.edu/ Scatterometer Climate Record Pathfinder: http://www.scp.byu.edu/ ======================================================================== Code is SIR header version 3.0 compliant. Last revised: 31 Jan 2002 DGL (c) 2002 BYU MERS