Search results Query: big island Links: 2 | Categories: 0 2.3/5 (56) DX Resources > IOTA IOTA maps — JA1QXY Maps and QSL gallery of IOTA islands all over the world No votes Operating Modes > Amateur Radio Astronomy Caltech Submillimeter Observatory (CSO) A 10.4-meter diameter, submillimeter spectrum telescope. Situated at the top of Mauna Kea, Big island, Hawaii.