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International Space Station Tracker

Software

Web Dev

JS

Raspberry Pi

Python

How it Works

Flow Diagram

The Javascript code below is running on the client device. It polls the ISS API every 1.5 seconds, converting the returned latitude and longitude into a mercator projection. Further code uses the P5 library to display the graphics on the webpage. All code can be viewed on my Github.

complete: function (data) {
if (data.readyState === 4 && data.status === 200) {
    Lat = data.responseJSON.latitude;
    Long = data.responseJSON.longitude;
    Velocity = data.responseJSON.velocity.toFixed(2).toString();
    Altitude = data.responseJSON.altitude.toFixed(2).toString();
    var x = (parseFloat(Long) + 180) * (MapWidth / 360);
    var latRad = (parseFloat(Lat) * Math.PI / 180);
    var mercN = (Math.log(Math.tan((Math.PI / 4) + (latRad / 2))));
    var y = (MapHeight / 2) - (MapWidth * mercN / (2 * Math.PI));


Python Email Notification

The Python code below sends an email if the latitude and longitude values are within a certain range. The "findISS" function works in a very similar way to the javascript implementation above. I run the code continuously on a Raspberry Pi.

Raspberry Pi Setup

server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()
while True:
    data = findISS()
    sleep(0.5)
    if (Latmin < float(data['iss_position']['latitude']) < Latmax) and (Longmin < float(data['iss_position']['latitude']) < Longmax):
        mmessage = """\
        Subject: ISS Tracker
        ISS overhead"""
        server.sendmail(sender_email, receiver_email, message)
        sleep(20)