The two types of radar use either the sky wave or surface wave and typical ranges are 100–3500 km and up to 500 km , respectively. Thus, OTHRs are often used for the strategic surveillance of large areas.
The two types of radar use either the sky wave or surface wave and typical ranges are 100–3500 km and up to 500 km , respectively. Thus, OTHRs are often used for the strategic surveillance of large areas.