KSHITEEJ MAHAJAN

GCS Software responsible for: – Receiving Data from the CanSat at Ground Station in real time – Storing the received raw data – Processing this raw data in real time to show meaningful data in presentable manner via graphs or map plots

Receiving Antenna connected via USB port to your GCS PC/Laptop Storing the received raw data Processing this raw data in real time to get real time graphs

We will learn to create a system that will cater to all roles required of GCS software This will be a really simple module and you can improvise on this or take a different approach for designing your own for the competition The language we will be using for the workshop: Java

We need to interact with the USB port from within the Java program We use the javaxcomm library for this. You can get it at: ware/javaxcomm.zip ware/javaxcomm.zip Let’s see how to use this library

Configuration steps once you download javaxcomm: comm.jar should be placed in: %JAVA_HOME%/lib %JAVA_HOME%/jre/lib/ext win32com.dll should be placed in: %JAVA_HOME%/bin %JAVA_HOME%/jre/bin %windir%System32 javax.comm.properties should be placed in: %JAVA_HOME%/lib %JAVA_HOME%/jre/lib

Let’s see a sample program

For real time plotting of data you can use an open source library. For java an example open source library is LiveGraph. It is available for download at: Let’s see the nature of data and it’s plot in live graph application

GPS data can be viewed in Google Earth For this we need to create an appropriate KML file Just like HTML file is to a browser, KML file is to Google Earth application Let’s see a typical KML file We have to auto-generate this KML file from the GPS data

Here we have outlined a simplistic Java based application for GCS software You are welcome to not use this and use other libraries in other programming languages. You can also use MATLAB for reading data from USB port and designing a UI for plotting the same in Matlab

The raw data we get from the CanSat may have errors as loss of data or the data being incorrect due to wireless mode of transfer from the CanSat to the GCS A real world ground station software needs to take care of these

THANK YOU !