ZBSS - GPS Base Station Software for Ashtech Receivers, compatible with Windows and Linux. Turnkey software solution for CORS and RTK base stations. No-cost evaluation.

Tide Prediction Applet is a Java applet that interactively plots accurate tide predictions for NOAA tide stations, using NOAA data. This is a signed applet that lets you print the plot, or save it as an image. Applets for NWLON tide stations in Connecticut, and nearest stations in New York and Rhode Island are provided.

GPS-based Network Time is a page with a Java applet that displays correct time (and how fast or slow your system is running) based on my NTP server. The page also displays a real-time overhead map of the satellites tracked by the GPS receiver used to regulate the server, generated by a Java servlet.

GNSS Calendar is an interactive javascript calendar covering 2003-2013 that provides useful information for GPS users, including Julian date, Day of Year, GPS Week, and links to rapid or final GPS and GLONASS Ephemerides.

About the clock applet on the right: this clock connects back to rvdi.com for a Network Time Protocol (NTP) timestamp so it can display the correct time, even if your system clock is inaccurate. The original BillsClock was a free applet in the early days of Java, and was downloaded and used on hundreds of websites.

The correct time in
Connecticut, USA

If you reset your system clock or time zone while this page is displayed, please reload the page.