An Experiment about Trilateration and 
Correction of Clock Error

-Tasks of the Recorder-

Tape measure

Preparation
•	You will need a long tape measure and pen and paper to note down the experiment data.

Procedure
•	Help the Receiver to measure the distances between each of the three Transmitters and write down the data. Draw a sketch to mark the position of each Transmitter.
•	You and the Receiver should choose any position on the field or meadow and place yourselves together on this spot of your choice. Try to choose a spot that is far away from the Transmitters as possible.
•	Write down the start time and velocity that is given to you by Transmitter #1, as well as the arrival time given to you by the Receiver. Make use of the table below. 
•	Repeat Step 3 with Transmitters #2 and #3. 

Sketch:  Distances between the 
Transmitters

	

Table: Experiment Data

	Transmitter 1	Transmitter 2	Tranmitter 3	

Start time

Arrival time

Velocity