Google Earth allows you to display coordinates saved into a kml file. Even better you can choose the refresh rate on GE so that you can see your path in real time. This is useful for GPS data tracking or even just for fun.
Google Earth Real Time Trajectory
Here are the steps to show a path in real time on Google Earth:
Go to “Add” -> “Network link”
Browse the kml file you want to lead. Here is an example: GPS-Dolphin.kml.
Go to the “Refresh” tab and choose your refresh rate. This will load the file at every x-seconds you choose.
now just make your software update the file as frequently as you want … or for basic testing just open the KML file in some text editor and change the coordinates to see what happens.
Tracking satellites can be fun (where is the ISS now?) … and complicated. Fortunately there are some algorithms that can help like the SGP4.
I’ve used an available php implementation of the SGP4 algorithm and made a simple satellite tracker application showing the ISS, but really it can show any satellite as long I feed the proper Two Line Element from CelesTrack.
For about a year I have been programming in Python as a Matlab alternative. I love Matlab but I can’t afford being tied to a licence. Python is free, open source, and so far I have been able to do everything I did with Matlab. I am fairly impressed!
Python is becoming, or it may be already, a main stream programming language, specially for open source software. Since it’s a scripting language a lot of programs use it for scripting in that app. A few examples are Blender for 3D modeling and animation, FreeCad for 3D mechanical modeling, Fenics for solving differential equations by finite element methods, etc. Many universities have adopted Python in their class work, MIT, Georgia Tech, UC Davis, etc.
If you want to start with Python let me recommend the following:
Use Enthought! Yes, I know … there is also a licence attached if you really want full support and all the packages. But it’s free if you have a .edu email and even if you don’t have one there is a totally free version of Enhtought: Canopy Express! By the way, the Enthought distro works on Mac, Linux and Windows. It’s perfect!
If you really… really don’t want to be attached to a licence (I made my peace with Enthought since they have a free version) you can use Spyderlib. It’s also an Integrated Development Environment (IDE) like Enthought but has a few less python libraries… but you can install them separately with a bit of pain.
If you want to lear more about Python and how to get started check these references:
