COMPARISON OF PLASMA-FLOW VELOCITIES DETERMINED BY THE IONOSONDE DOPPLER DRIFT TECHNIQUE, SUPERDARN RADARS, AND PATCH MOTION

被引:84
作者
GRANT, IF
MACDOUGALL, JW
RUOHONIEMI, JM
BRISTOW, WA
SOFKO, GJ
KOEHLER, JA
DANSKIN, D
ANDRE, D
机构
[1] UNIV WESTERN ONTARIO,DEPT PHYS,LONDON,ON N6A 3K7,CANADA
[2] UNIV SASKATCHEWAN,INST SPACE & ATMOSPHER STUDIES,DEPT PHYS,SASKATOON,SK S7N 0W0,CANADA
[3] JOHNS HOPKINS UNIV,APPL PHYS LAB,LAUREL,MD 20723
关键词
D O I
10.1029/95RS00831
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We compare measurements of polar cap ionospheric plasma flow over Resolute Bay, Canada, made by a digital ionosonde using the Doppler drift technique with simultaneous measurements at the same location made by the first operational pair of SuperDARN HF radars. During the 3-hour comparison interval the flow varied widely in direction and from 100 to 600 m/s in speed. The two measurement techniques show very good agreement for both the speed and direction of flow for nearly all of the samples in the interval. The difference between the velocities determined by the two techniques has a scatter of about +/- 35 degrees in direction and +/- 30% in speed, with no systematic difference above the level of the scatter. The few samples which strongly disagreed were usually associated with strong spatial structure in the flow pattern measured by SuperDARN in the vicinity of the comparison point. The drift speed measured by the ionosonde was independently verified by observing the time taken for polar cap F layer ionization patches to drift between ionosondes sited at Eureka and Resolute Bay. These results confirm that the speed and direction of the polar cap ionospheric convection can be reliably monitored by the ionosonde Doppler drift technique.
引用
收藏
页码:1537 / 1549
页数:13
相关论文
共 19 条
[1]   MESOSPHERIC OBSERVATIONS USING A 2.66-MHZ RADAR AS AN IMAGING DOPPLER INTERFEROMETER - DESCRIPTION AND 1ST RESULTS [J].
ADAMS, GW ;
BROSNAHAN, JW ;
WALDEN, DC ;
NERNEY, SF .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1986, 91 (A2) :1671-1683
[2]  
Bibl K., 1975, SPACE RES, V15, P405
[3]   POLAR-CAP PLASMA CONVECTION MEASUREMENTS AND THEIR RELEVANCE TO THE MODELING OF THE HIGH-LATITUDE IONOSPHERE [J].
BUCHAU, J ;
REINISCH, BW ;
ANDERSON, DN ;
WEBER, EJ ;
DOZOIS, C .
RADIO SCIENCE, 1988, 23 (04) :521-536
[4]   DIGISONDE MEASUREMENTS OF POLAR-CAP CONVECTION FOR NORTHWARD INTERPLANETARY MAGNETIC-FIELD [J].
CANNON, PS ;
CROWLEY, G ;
REINISCH, BW ;
BUCHAU, J .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1992, 97 (A11) :16877-16885
[5]   RESPONSE OF THE POLAR-CAP F-REGION CONVECTION DIRECTION TO CHANGES IN THE INTERPLANETARY MAGNETIC-FIELD - DIGISONDE MEASUREMENTS IN NORTHERN GREENLAND [J].
CANNON, PS ;
REINISCH, BW ;
BUCHAU, J ;
BULLETT, TW .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1991, 96 (A2) :1239-1250
[6]   PLASMA CONVECTION IN THE VICINITY OF THE DAYSIDE CLEFT [J].
FOSTER, JC ;
DOUPNIK, JR .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1984, 89 (NA10) :9107-9113
[7]   CONVECTION OF POLAR-CAP PATCHES OBSERVED AT QAANAAQ, GREENLAND DURING THE WINTER OF 1989-1990 [J].
FUKUI, K ;
BUCHAU, J ;
VALLADARES, CE .
RADIO SCIENCE, 1994, 29 (01) :231-248
[8]   DARN SUPERDARN - A GLOBAL VIEW OF THE DYNAMICS OF HIGH-LATITUDE CONVECTION [J].
GREENWALD, RA ;
BAKER, KB ;
DUDENEY, JR ;
PINNOCK, M ;
JONES, TB ;
THOMAS, EC ;
VILLAIN, JP ;
CERISIER, JC ;
SENIOR, C ;
HANUISE, C ;
HUNSUCKER, RD ;
SOFKO, G ;
KOEHLER, J ;
NIELSEN, E ;
PELLINEN, R ;
WALKER, ADM ;
SATO, N ;
YAMAGISHI, H .
SPACE SCIENCE REVIEWS, 1995, 71 (1-4) :761-796
[9]   EMPIRICAL HIGH-LATITUDE ELECTRIC-FIELD MODELS [J].
HEPPNER, JP ;
MAYNARD, NC .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1987, 92 (A5) :4467-4489
[10]  
MACDOUGALL JW, 1995, IONOSONDE NETWORKS S, P21