X-browse Image Browsing Tool

X-browse is an image browsing tool that works over the Internet. X-browse uses progressive transmission to facilitate browsing large images over the limited bandwitdh supplied by the Internet.

Near real-time, satellite-derived sea surface temperature (SST) data, which are available for browsing over the Internet via the X-browse tool is available. In addition to visual "browsing" of the data, the X-browse system also allows the names of user-selected images to be listed in a file on the local host for later use in retrieving those images from the X-browse server via ftp.

At the present time all daily NOAA-11 Advanced Very High Resolution Radiometer satellite passes from 1 October 1993 up to the present day (generally 2 passes per day) have been remapped (earth-located) to the Gulf of Maine domain (given below) in a Mercator projection and are available from the server. This domain is bounded by:

	39.013 - 45.429 deg N latitude, and
	63.487 - 72.164 deg W longitude.

Precision navigation of each image on the server to within 1 or 2 pixels has begun with the image names receiving a ".nav" file extension when navigation is completed. Be aware that "un-navigated" images (".rmp" file extension) may posses navigation erros of up to 6 or 7 pixels in the meridional and/or zonal directions.

Daily remapping and weekly backups of these data will continue until after completion of the GLOBEC and Gulf of Maine field programs. Each of these images are in University of Miami XDR04 format, consisting of an 8-bit, 512 X 512 pixel binary image, preceded by three 512-type header records. The size of each image file (in uncompressed form) is ~250K bytes.

The latest X-browse client (version 3.3.7) is available for SunOS 4.1.3 (Sun SPARC), OSF 1.3 (DEC Alpha) and Ultrix 4.4 ( DECstation) via anonymous ftp from zeno.gso.uri.edu (/pub/xbrowse) and must be properly installed on your local host for the system to work.

For more information contact Jim Bisagni, NOAA Remote Sensing Laboratory, Northeast Fisheries Science Center, NOAA/NMFS, 28 Tarzwell Drive, Narragansett, RI 02882. His email address is bisagni@fish1.gso.uri.edu.

Copyright 1991, 1992, 1993, 1994 University of Rhode Island. Portions of the program Copyright 1992 Robert Forsman, (FileComp dialog boxes) Copyright (C) 1989 by Jef Poskanzer. (pgm image file library) Mr Poskanzer's copyright notice: Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty. Thanks to RAMO@uvphys.phys.UVic.CA for the RS6000 patches and binary.