Foreword

Abstract

ForewordThe 1999 Ionospheric Effects SHnposimn (IES 99) was held May 4-6, 1999 at the Rmnada Plaza Old Town in Alexandria, Virginia. This special section of Radio Science contains a broad selection of papers delivered at IES 99. Over 90 talks and papers, as well as over a dozen posters and de•nonstrations, were presented during the Symposimn.