Geoware Tsunami Product List

The TTT (Tsunami Travel Times) CD-R contains specialized software used to calculate first arrival times for tsunamis. Geoware has recently completed a major revision of TTT, our program used by numerous organizations to estimate predicted tsunami travel times from bathymetry on a geographic grid. TTT uses the long-wave assumption and employs a 64-node Huygens construction method to solve for the propagation of the wave front. Due to the extensive node-search the resulting travel times are almost free of artifacts caused by the rectangular grid. Significant new improvements include:

Handling of global grids with proper geographic boundary conditions in both longitude and latitude
Ability to work with both pixel and gridline grid formats and both short int and float bathymetry grids
Smarter internal binary tree algorithm that reduces total execution time by 50-80%
Better memory use (~2/3rd of previous memory usage)
Ability to specify a sub-region with new -R option
An installation independent of GMT source code

SYSTEM REQUIREMENTS: TTT 3.0 is a self-contained program and the POSIX-compliant C-source code can be compiled and installed on any computer running either a 32- or 64-bit version of Windows, Mac OS X, Linux, or UNIX. Its disk space and memory requirements range from modest to extensive, depending on the size of the user's region of interest and the grid resolution. Memory allocation is dynamic, so large grids can be accommodated given enough memory.

USER INTERFACE: TTT 3.0 is a stand-alone, command-line program. This is the most flexible solution since it may easily be invoked from the user's custom user-interface, shell-script, or directly on the command line. TTT returns one of ~25 status flags upon completion, allowing the calling environment to detect error conditions and take appropriate action. The TTT package also comes with the command-line tool TTT_PICK, which can sample the travel-time grid at specified locations where Estimated Times of Arrival (ETA) are requested.

BATHYMETRY DATA: TTT 3.0 is distributed with several versions of global bathymetry, all derived from revision 2 of the ETOPO-2 data set . The resolutions of the data sets are 2', 5', 10', 15', 20', 30', and 60'. Except for the 2' grid, the courser data sets have been filtered in the slowness domain to avoid aliasing and bias that would result from filtering in the bathymetry domain. Users may also use their own bathymetry grids in the GMT native short integer or float formats.

ANALYSIS AND MAPPING: The free, open source GMT programs are strongly recommended for further grid analysis and general plot making, and for conversion into other grid formats.

All CD-ROMs are compatible with installations under both Unix/Linux (incl. Mac OSX) and Windows operating systems.

TTT CD-R Version 3.0 September 2007.
	This CD-R contains the latest version of the Tsunami Travel Times software. The new version 3.0 provides installation for both Unix/Linux/MacOSX systems and Windows (InstallShield installation) and is fully ANSI-C/POSIX compatible. The CD-R contains premade global bathymetry grids at 2, 5, 10, 15, 20, 30, and 60 minute resolutions. TTT is now independent of GMT; however GMT is recommended for analysis and plot making. For more details, click here.
	Unit Price: $ 550.00. S/H adds $ 5.00. Place your order via PayPal.
TTT CD-R Version 3.0 September 2007 UPGRADE FROM v 2.3 OR 2.4.
	Special $250 discount for registered users of TTT version 2.3 or 2.4.
	Unit Price: $ 300.00. S/H adds $ 5.00. Place your order via PayPal.
TTT CD-R Version 3.0 September 2007 UPGRADE FROM v 2.2 or earlier.
	Special $150 discount for registered users of TTT version 2.2 or earlier.
	Unit Price: $ 400.00. S/H adds $ 5.00. Place your order via PayPal.

Shipping/Handling charges include Worldwide Airmail shipping. We recommend you order and pay using your credit card with the above free PayPal service, available from most countries. Alternatively, we accept (1) Company Purchase Orders or (2) Pre-payment by check in US dollars drawn on a US bank (no Eurochecks, sorry). Foreign companies who insist on bank wire must pay an extra USD 5.00 in wiring fee. Print out and fill in the order form and send it with your purchase order or check to

Geoware, c/o Paul Wessel
91-1007 Aawa Drive
Ewa Beach, HI 96706-3901
USA

Also notify us by e-mail of your intent to purchase products by purchase orders or check so that we may prepare your order prior to the arrival of your mail. Please contact us should you require more information.

This page was last modified on Tuesday, June 3, 2008.