FAQ for ISO 19115 and 19115-2 Alternate Views: Get Data, FAQ, ISO Rubric, DOI Rubric, CSW, HTML, Components, XML
browse graphic The ionospheric sounder ("ionosonde") is a radar system operating in the radio frequency range typically 1 to 15 MHz. Earth's ionosphere reflects such radiowave pulses, returning echoes that characterize the reflection-point ionization density and its height, among other properties.