Nanosatellites can also detect the signals generated by third parties. These small satellites can tune into certain frequency bands, identify broadcasts from Earth and space and analyse the electromagnetic spectrum of these frequency bands. They can be used to record unauthorised broadcasts, detect interferences and locate their origin. Even encrypted broadcasts can be geolocated, providing details of their modulation type and the areas they may be related to.
Consequently, in the event of a natural disaster, the nanosatellites will have prior information about impact levels and the most affected areas, thereby facilitating more effective rescue and relief work.