{"product_id":"9780863412387","title":"Radio Direction Finding and Superresolution","description":"\u003cp\u003eEnlarged and revised second edition. Modern direction finders, capable of measuring elevation angles as well as azimuth angles on the components of multi-ray wavefields, have become powerful tools for research in ionospheric physics and HF radio propagation. The complexity of the problem of resolving closely-spaced rays requires the combined use of wide aperture antenna arrays, multichannel receiving systems and sophisticated digital processing techniques.\u003c\/p\u003e","brand":"The Institution of Engineering and Technology","offers":[{"title":"Default Title","offer_id":47018647814384,"sku":"9780863412387","price":124.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780863412387_p0.jpg?v=1763836404","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780863412387","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}