JSatTrak 4.1.3 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. JSatTrak belongs to Education Tools. This free software was originally created by Shawn Gano. The most popular version of the tool 4.1.
From the developer:
JSatTrak is a Satellite tracking program written in Java. It allows you to predict the position of any satellite in real time or in the past or future. It uses advanced SGP4/SDP4 algorithms developed by NASA/NORAD or customizable high precision solvers to propagate satellite orbits. The program also allows for easy updating of current satellite tracking data via CelesTrak.com
You may want to check out more software, such as Travoltage or Deming, which might be related to JSatTrak.