Riometer Network

Table of active La Jolla riometer stations:

station	dig. rec. since	geographic co-ordinates	L-val.	MHz	timing	AD converter	sampling	temp record
HORNSUND	1996	77.00°N 15.60°E	13.1	30.0	DCF	8-bit	10 s	no
ABISKO	1996	68.40°N 18.90°E	5.6	30.0	GPS	16-bit	10 Hz	yes
IVALO	1994	68.55°N 27.28°E	5.5	29.9	GPS	16-bit	10 Hz	yes
SODANKYLÄ	1994	67.42°N 26.39°E	5.1	30.0	GPS	16-bit	10 Hz	yes
	1993			51.4	GPS	16-bit	10 Hz	no
ROVANIEMI	1994	66.78°N 25.94°E	4.8	32.4	GPS	16-bit	10 Hz	yes
OULU	1994	65.08°N 25.90°E	4.3	30.0	GPS	16-bit	10 Hz	yes
JYVÄSKYLÄ	1994	62.42°N 25.28°E	3.7	32.4	GPS	16-bit	10 Hz	yes

All the present riometers have dual half-wavelength dipole antenna, which forms 60 ° wide beam.

Historical table of riometers operated by SGO:

station	oper. since	geographic co-ordinates	L-val.	MHz	type	BW kHz	reg.sweep kHz s		min det	AGC	ant	rec mm/h	down/ up
HORNSUND	1981	77.00°N 15.60°E	13.1	30.0	LJ	30				x	DD	60	1 s / 1 s
KEVO *	1968	69.75°N 27.02°E	6.0	27.6	DA	2	100	30	x	x	Y3	60	1 s / 1 m
KILPISJÄRVI *	1980	69.02°N 20.86°E	5.9	30.0	LJ	30				x	DD	60	1 s / 1 s
IVALO	1972	68.55°N 27.28°E	5.5	29.9	LJ	30				x	DD	60	1 s / 1 m
SODANKYLÄ *	1964	67.42°N 26.39°E	5.1	27.6	DA	2	100	30	x	x	Y3	60	1 s / 1 m
	1979									x	NB	60	1 s / 1 s
	1969			40.0	LJ	30				x	DD	60	1 s / 1 s
	1984			51.4	LJ	30				x	DD	60	1 s / 1 s
ROVANIEMI	1974	66.78°N 25.94°E	4.8	32.4	LJ	30				x	DD	60	1 s / 1 m
OULU *	1967	65.08°N 25.90°E	4.3	29.7	DA	2	100	30	x	x	Y3	60	1 s / 1 s
JYVÄSKYLÄ	1974	62.42°N 25.28°E	3.7	32.4	LJ	30	100	30	x	x	DD	60	1 s / 1 m
NURMIJÄRVI *	1967	60.51°N 24.65°E	3.3	27.6	DA	2	100	30	x	x	DD	60	1 s / 1 m
ABISKO	1987	68.40°N 18.90°E	5.6	30.0	LJ	30				x	DD	76	1 s / 1 s
				30.0	LJ	30				x	NB	76	1 s / 1 s
VIDSEL	1987	65°48'N		30.0	LJ	30				x	DD	76	1 s / 1 s
RAMFJORD	1987	69°42'N	6.15	30.0	LJ	30				x	DD	76	1 s / 1 s
ANDENES	1987	69°18'N	6.15	30.0	LJ	30				x	DD	76	1 s / 1 s
SIGLUFJORDUR	1987	66°12'N	6.7	30.0	LJ	30				x	DD	76	1 s / 1 s

Legend:	type: DA DAVID ANDERSEN LJ LA JOLLA	antenna Y3 3 el. YAGI NB narrow beam DD dual dipole	down/up s second m minute

Coordinates for Ivalo 68°34'N, 27°50'E until October 1991 at 27.6 MHz (DA)
Coordinates for Rovaniemi 66°34'N,25°50'E until September 1985 at 27.6 MHz (DA)
Coordinates for Jyväskylä 62°34'N, 25°40'E until December 1986 at 27.6 MHz(DA)