Abstract
It is well known that the magnetic field variations in the near geomagnetic-pole region can be used as an index of magnetospheric convection driven by solar wind-magnetosphere coupling (PC index). Northern PC index (PCN) is derived from Qaanaaq (formally, Thule). Unfortunately, PCN is not produced in near-real time. To monitor the current condition of magnetospheric convection, it is necessary to collect geomagnetic field data in the near-geomagnetic pole region and to produce PCN-like index from those data. We have developed the system for collecting magnetic field data from Eureka, which is located in the northern near-pole region and transferring the data from Eureka to CRL in near real-time. Our system was installed at Eureka and has been operated since summer of 1999. Before producing PCN-like index from Eureka, we have compared geomagnetic field variations at Eureka and those at Qaanaaq. From the results of our data analysis, we have confirmed that PCN-like index can be derived from Eureka except for the period of low solar zenith angle (SZA < 70 deg.).
Original language | English |
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Pages (from-to) | 99-106 |
Number of pages | 8 |
Journal | Journal of the Communications Research Laboratory |
Volume | 49 |
Issue number | 4 |
Publication status | Published - 2002 Dec 1 |
Externally published | Yes |
Keywords
- Geomagnetic observation
- Magnetospheric convection
- PC index
- Solar wind-magnetosphere-ionosphere coupling
- Space weather forecast
ASJC Scopus subject areas
- Electrical and Electronic Engineering