ISEE VLF/ELF Network Home Page .
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GEOGRAPHIC AND GEOMAGNETIC COORDINATES
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calculation: dipole geomagnetic coordinates (IGRF model)
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glat glon mlat mlon inclination declination collaborators
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IST 70.03 88.01 60.6 166.6 83.79 19.30 ISTP
HUS 64.67 338.97 64.9 66.2 75.78 -14.34 NIPR/U.Iceland
OUJ 64.51 27.23 61.3 117.4 76.11 12.33 SGO/U. Oulu
MAM 63.06 129.56 58.0 202.0 77.38 -15.93 IKFIA
GAK 62.39 214.78 63.6 268.51 75.80 18.31 GI-UAF/Kanazawa U.
NAI 56.54 298.269 65.8 14.8 75.36 -22.92 NICT, Augsburg College
ATH 54.60 246.36 61.2 307.2 76.15 15.7 U.Athabasca/Kanazawa U.
KAP 49.39 277.81 58.7 347.6 74.17 -10.19 Virginia Tech.
MSR 44.37 142.27 35.6 209.5 58.58 -9.5 ISEE Observatory/Chiba U.
KAG 31.48 130.72 21.9 200.6 45.1 -6.1 ISEE Observatory/Chiba U.
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station A/D board input voltage VLF antenna No.
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Nain +/-10V=16bit 04
Gakona +/-10V=16bit 06
Kapuskasing +/-5V =16bit 02
Athabasca +/-5V =16bit 01
Maimaga +/-5V =16bit 03
Istok +/-10V=16bit 05
Oulujarvi +/-10V=16bit 10
Moshiri +/-5V =16bit 08
Kagoshima +/-5V =16bit 09
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------ Current Configuration -----------
Istok (IST), Russia : 70.03N, 88.01E
VLF/ELF crossed loop antenna #05 (Create Design, HR130C) (Oct 29, 2017-)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 20Volt=65536digit)
Husafell (HUS) : 64.67N, 338.97E
VLF/ELF crossed loop antenna #07 (Create Design, HR130C) (Jan.27, 2017-)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 10Volt=65536digit)
(10-min data gap exists every hour)
The original data is recorded by Kanazawa Univerisity. The file
format is converted to the PWING format at Nagoya University.
Oulujarvi (OUJ) : 64.51N 27.23E
VLF/ELF crossed loop antenna #10 (Create Design, HR130C) (October 11, 2022-)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 20Volt=65536digit)
Maimaga (MAM), Russia : 63.06N, 129.56E
VLF/ELF crossed loop antenna #03 (Create Design, HR130C) (Apr. 4, 2017-)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 10Volt=65536digit)
Gakona (GAK), Alaska : 62.39N, 214.78E
VLF/ELF crossed loop antenna #06 (Create Design, HR130C) (Sept. 29, 2017-)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 20Volt=65536digit)
The antenna location is N 62deg24'30.22'', W145deg09'36.59'' by GPS on 170930
Nain (NAI), Canada: 56.54N, 298.269E
VLF/ELF crossed loop antenna #01 (Create Design, HR130C) (Sept.11, 2018-Aug.31, 2023)
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 20Volt=65536digit)
Athabasca (ATH), Canada : 54.7N, 246.7E
VLF/ELF crossed loop antenna #01 (Create Design, HR130C) (Feb.19, 2012-):
10turn, 5-m height, 100kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: riometer, ch.4: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 472,000,032Bytes
(100kHz sampling, 4ch, 2Byte, 10Volt=65536digit).
Feb 27-Sept.22, 2012: noisy operation near the AUGSO building (no data)
On Nov.12, 2015, 0530UT, the sampling rate was reduced from 100kHz to 40kHz.
On Oct.26, 2016, 2350UT, the channel is reduced from 4ch to 3ch
(riometer channel is removed).
Kapuskasing (KAP), Canada : 49.39N, 277.81E
VLF/ELF crossed loop antenna #02 (Create Design, HR130C) (Dec.12, 2016-):
10turn, 5-m height, 40kHz sampling, sensitivity peak at 8kHz
ch.1: VLF-NS, ch.2: VLF-EW, ch.3: GPS 1pps
ch:1(VLF-NS): E-W antenna measureing NS magnetic field variation
ch:2(VLF-EW): N-S antenna measureing EW magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 10Volt=65536digit)
Moshiri (MSR or MOS), Japan : 44.37N, 142.27E
Valley antenna (1980 - Aug.28, 2009)
1962: VLF wave observation was started at Moshiri
1980: Data tansfer started using 10-km optical fiber from the
Valley antenna to the observatory building
VLF/ELF crossed loop antenna with a 43-m tower (Aug.28, 2009-)
1ch, 20kHz sampling, sensitivity peak at 5kHz
VLF/ELF crossed loop antenna with a 43-m tower (June 18, 2019) (No.8)
3ch, 40kHz sampling
ch.1: VLF-EW, ch.2: VLF-NS, ch.3: GPS 1pps
ch:1(VLF-EW): N-S antenna measureing EW magnetic field variation
ch:2(VLF-NS): E-W antenna measureing NS magnetic field variation
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 10Volt=65536digit)
Kagoshima (KAG) : 31.48N, 130.72E
Valley antenna (April 1976 - 2001) at Sarugajo (main) and Maenohama
triangle shape 90m(W) x 50m x 50m
Maenohama antenna was closed on March 1999.
Sarugajo antenna was closed in 2001.
VLF/ELF crossed loop antenna (2-turn) with a ~15m tower (2001-Oct.2009)
VLF/ELF crossed loop antenna (2-turn) with a 13.9m tower (Oct.19, 2009-)
sensitivity peak at 2-8kHz with a notch at 7kHz.
recording: analogue tape: 1976-2003, analogue Mini disk: 2004-2007
digital data (2008-): 1ch (VLF-EW = NS antenna), 20kHz sampling
after March 3, 2020: 3ch, 40kHz sampling
ch.1: VLF-data, ch.2: no data, ch.3: no data
1 datafile = 9min50s = 141,600,032Bytes
(40kHz sampling, 3ch, 2Byte, 10Volt=65536digit)
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Acknowledgements:
The ISEE VLF/ELF receivers have been developed and operated with
skillful supports by Toshirou Kotoh, Mitsugi Satoh, Yasuo Katoh,
Yoshiyuki Hamaguchi, and Yuka Yamamoto, all are technical staff
of the Solar-Terrestrial Environment Laboratory (STEL) and
Institute for Space-Earth Environmental Research (ISEE), Nagoya University.
The routine construction system of the spectral plots in this
web site was developed by Yu Yokoyama and Professor Yuichi Otsuka
of ISEE.
The Valley antennas at Kagoshima and Moshiri were developed by
a leadership of late Professor A. Iwai, Research Institute of
Atmospherics, Nagoya University.
The VLF/ELF observation at the Kagoshima Observatory of STEL had been
continuously supported by late Takasuka (until 1990) and
late Koichi Hidaka (until 2007). Both were the technical staff
of STEL. H. Kogushi and O. Hayashi made the tape list and
digitize the tapes since 2007.
The VLF/ELF observation at the Moshiri Observatory of STEL/ISEE had been
continuously supported by Masayuki Sera and Yuji Ikegami.
Both are the technical staff of STEL/ISEE.
The VLF/ELF observations at Kagoshima and Moshiri are carried out
in collaboration with Dr. Hiroyo Ohya of the Chiba University.
The VLF/ELF loop antenna at Athabasca, Kapuskasing, Canada, and
Maimaga, Russia, has been developed by Dr. Mitsunori Ozaki
and Professor Satoshi Yagitani of the Kanazawa University,
in collaboration with Professor Natsuo Sato,
Professor Hisao Yamagishi, and Dr. Akira Kadokura of the
National Institute of Polar Research.
The routine observation at Athabasca is carried out at the AUGO-II
(AUGSO) observatory of Athabasca University. We thank
Professor Martin Connors, Dr. Ian Schofield, Mr. Kyle Reiter, and
all the staff of the Athabasca University for their kind and
helpful supports.
The VLF/ELF loop antennae at Nain, Gakona, and Istok, has been
developed by Dr. Mitsunori Ozaki of the Kanazawa University through
the PWING project.
This observation and database construction have been supported by:
(a) Grant-in-Aid for Scientific Research (20244080, 23403009, and 16H06286)
of the Ministry of Education, Culture, Sports, Science
and Technology of Japan,
(b) Geospace Research Center of STEL.
ISEE VLF/ELF Network Home Page .