Abstract Over‐the‐horizon radar (OTHR) systems operating in the high‐frequency (HF) band (3–30 MHz) are unique in their ability to detect targets at extreme ranges. offering cost‐effective large‐area surveillance. Due to their reliance on the reflective nature of the ionosphere in this band. OTHR systems are extremely sensitive to ionospheric conditions and can expect significant vari... https://cosmeticssquadets.shop/product-category/daily-cream/