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A Comparison of the Topside Electron Density Measured by the Swarm Satellites and Incoherent Scatter Radars Over Resolute Bay, Canada
被引:9
作者:
Larson, B.
[1
]
Koustov, A. V.
[1
]
Kouznetsov, A. F.
[2
]
Lomidze, L.
[2
,3
]
Gillies, R. G.
[2
]
Reimer, A. S.
[4
]
机构:
[1] Univ Saskatchewan, Inst Space & Atmospher Studies, Dept Phys & Engn Phys, Saskatoon, SK, Canada
[2] Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada
[3] E Kharadze Georgian Natl Astrophys Observ, Abastumani, GA USA
[4] SRI Int, Ctr Geospace Studies, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA
基金:
美国国家科学基金会;
加拿大自然科学与工程研究理事会;
加拿大创新基金会;
关键词:
Swarm satellites;
incoherent scatter radars;
electron density;
topside ionosphere;
polar cap;
SCALE HEIGHT;
IONOSPHERE;
NEQUICK;
MODEL;
REGION;
IRI;
D O I:
10.1029/2021RS007326
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
Electron density measured at high latitudes by the Swarm satellites is compared with the measurements by the RISR incoherent scatter radars as the satellites fly by the radars' field of views near Resolute Bay, Canada between 2014 and 2019. More than 200 satellite passes crossing multiple radar beams are considered. Overall, the Swarm-based electron densities are smaller than those measured by the radars by similar to 30%. The values are closer to one another at electron densities between similar to 3x1010 and similar to 15x1010m-3, corresponding to plasma frequencies between 1.5 and 3.5 MHz. Swarm-measured values are getting progressively smaller than those measured by radars at larger electron densities/plasma frequencies. For the entire range of measured electron densities, the slope of the best fit linear line to the data expressed in terms of electron density is similar to 0.62 and offset is similar to 2x1010m-3. Stronger differences between the instruments were found for observations at nighttime and dawn.
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页数:16
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