In today’s Tutorial we would like to show you the reason for our strong recommendation to use a speedsensor when you are conducting our aeroTEST. Every GPS device provide different values in regards to the quality of the data recorded. Since even models within the product line of one manufacturer have different quality levels we do not want to go into details of manufacturers. More important for us is to show you the different levels of quality you can reach and therefore how strong the results of your aeroTEST are by using a speedsensor or not. Our aeroTEST is based on a 1km long test stretch. By using a speedsensor you will be providing a konstant rate of data to your GPS device, which could be influenced by external factors (e.g. Trees, Buildings, …). Over a long period of time this can be mitigated, such as single sided powermeters. However over the short stretch used by us for the evaluation of our test ± 2km/h within a series of measurement intervals makes a big difference.
To illustrate this, we will use the following two pictures.