MIDLATITUDE SPORADIC-E LAYERS AND VERTICAL METALLIC ION DRIFT PROFILESROYRVIK O.1983; PLANETARY AND SPACE SCIENCE; ISSN 0032-0633; GBR; DA. 1983; VOL. 31; NO 2; PP. 253-264; BIBL. 12 REF.Article

Spaced antenna drift at Jicamarca, mesospheric measurementsROYRVIK, O.Radio science. 1983, Vol 18, Num 3, pp 461-476, issn 0048-6604Article

VHF radar signals scattered from the equatorial mesosphereROYRVIK, O.Radio science. 1983, Vol 18, Num 6, pp 1325-1335, issn 0048-6604Article

NONTHERMAL SCATTERING OF RADIO WAVES NEAR 150 KM ABOVE JICAMARCA, PERUROYRVIK O; MILLER KL.1981; J. GEOPHYS. RES.; ISSN 0022-1406; USA; DA. 1981; VOL. 86; NO A1; PP. 180-188; BIBL. 5 REF.Article

Relationship between scattered power and correlation time in VHF radar signalsRØYRVIK, O.Radio science. 1985, Vol 20, Num 2, pp 212-220, issn 0048-6604Article

Electron-density irregularities in the day-time equatorial ionosphereSMITH, L. G; ROYRVIK, O.Journal of atmospheric and terrestrial physics. 1985, Vol 47, Num 8-10, pp 813-824, issn 0021-9169Article

COMMENT ON " PULSATING AURORA: LOCAL AND GLOBAL MORPHOLOGY" BY P. ROYRVIK AND T.N. DAVISSIREN JC; DAVIS TN; ROYRVIK O et al.1978; J. GEOPHYS. RES.; USA; DA. 1978; VOL. 83; NO A11; PP. 5325-5328; BIBL. DISSEM.Article