AURORAL ZONE IONOSPHERIC RESEARCH.

• Main Authors: Liszka,Ludwik, Westerlund,Svante
• Other Authors: KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN)
• Format: Text
• Language: English
• Published: 1965
• Subjects: (*AURORAE; IONOSPHERE); (*IONOSPHERE; AURORAE); SCIENTIFIC SATELLITES; SCINTILLATION COUNTERS; MAGNETOOPTICS; DIFFRACTION; ELECTRONS; POLAR REGIONS; DIURNAL VARIATIONS; GEOMAGNETISM; ELECTROMAGNETIC RADIATION; AUDIO FREQUENCY; EXTRATERRESTRIAL RADIO WAVES; GEOPHYSICS; Faraday; Kiruna; Norway; Tromso
• Online Access: http://www.dtic.mil/docs/citations/AD0616841; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0616841

A large number of satellite records were investigated with emphasis on scintillation phenomenon and Faraday rotation. The scintillation-rate spectrum of satellite signals at 54 Mc/s observed at Kiruna was studied. Temporal variations in the scintillation-rate spectrum, in particular the occurrence of slow and fast scintillation was investigated. The height of scintillation-producing irregularities was studied. Measurements made at Kiruna were even compared with those made at Tromso, Norway. A new method for measuring of velocity of the diffraction pattern on the ground was also proposed. Irregularities of Faraday rotation were studied using satellite records made at seven European observatories. The correlation of the amplitude of the irregularities at different locations at the same time, and the correlation with other geophysical parameters was examined. Some new results on the horizontal gradients of electron content in the polar regions were obtained. The ionospheric electron content near the auroral zone was even investigated using differential Faraday observations of the multifrequency beacon satellite S-66 (1964-64A). Measurements made and results obtained during the last year are reported. Radiation in the range 5-55 c/s has no diurnal variation in January 1965. Polarisation measurements at 700 c/s show linear polarisation and a direction of the magnetic vector, which is almost constant. (Author) See also AD-602 655.