A high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004. using the EISCAT HF transmitter located near Tromsø. Norway. During this experiment the spectra of the stimulated HF sideband waves (stimulated electromagnetic emission or SEE) induced by the HF pump were observed using an interferometer consisting of three spaced re... https://lampsusaes.shop/product-category/pendant-lighting/