The sketch shows the detection of a en:Gravitational wave with a en:Pulsar timing array in a schematic way. The pulsars P1 ... Pn are sending signals periodically, which are received on Earth. A gravitational wave (GW) changes the distance, earth (E) - pulsar; while the distance changes, also the time between pulses change. By measuring the changes in the pulse parameters and their correlations, a gravitational wave can be detected.
Own work
Hfst