Illustrated History of the Seismometer Project, 2001-2003:
Windows-based SIMA code via the Internet

  The long-period four-seismometer system described previously had been successfully ported onto a modern PC and the SAS computer code had been completely rewritten to support the distribution of all signals in near-real-time on the Internet.  The computer programming to accomplish this was done a student, Mike Sands, who graduated from Moravian College in spring of 2002.  The code, called "Seismic Internet Monitoring Application," or SIMA for short, ran at both Moravian College and Kean University in Union, New Jersey, our beta test site.  The software used a embedded micro-system, called a TINI, and has a server/client design.  With this system, anyone who ran our client software on a modern PC in a Windows environment was able to receive our signals from all four channels from Moravian College, as well as simultaneously receiving the signals from the two horizontal seismometers at Kean University.  This software package was available for free download from the web site, but has since been superseeded by the newer SIMA2 code (see below). 

    In January, 2003, an additional TINI had been installed at Moravian College to monitor the one long-period seismometer that was located in the classroom.  A former student, David Skoupil, who is now a Professor of Computer Science at Palacky University in the Czech Republic, had one of his students work with this Internet signal to rewrite and improve the SIMA code for all three components of the SIMA system:  the TINI, the server, and the client.    

     In February, 2003, I removed from the long-period system the 8-second period vertical seismometer on loan from Lehigh University, and substituted for it a Kinematics Model SV-1 vertical seismometer, which has a period of 5 seconds.  The SV-1 unit was purchased on an e-Bay auction about a year before.  I constructed an amplifier for the SV-1, and removed the Fluke meter from the system.  Thus, all seismometers on both the long- and short-period systems were using my home-made amplifiers.  The SV-1 seismometer was well suited to the long period system.

    During the summer of 2003, David Skoupil updated the TINI code to use the most current operating system available from Systronix, supplier for the TINI.  David also revised several of the features of the TINI code.  As a consequence, the TINI code ran with complete reliability and, moreover, became a plug-and-play device.