Where are EPIRB signals received by satellites?

The correct choice indicates that EPIRB signals are received by satellites in low earth polar orbit. This is significant because satellites in this orbit have the ability to pass over the entire Earth's surface as the planet rotates underneath them. EPIRBs (Emergency Position Indicating Radio Beacons) are designed to transmit distress signals to facilitate search and rescue operations.

Polar orbiting satellites are particularly effective because they can continuously monitor large areas of the Earth, allowing them to receive signals from EPIRBs regardless of the emitter's location. The low altitude of these satellites minimizes signal delay and enhances the chances of a swift response to distress calls.

In contrast, satellites in high altitude orbits, like geostationary orbits, might not be as effective for EPIRB signals that require consistent coverage across varying latitudes. Geostationary satellites stay fixed over the equator and cannot assist with signals from higher latitudes, while suborbital trajectories do not achieve the stable positioning necessary for reception of distress signals from devices like EPIRBs.