Sodankylä Geophysical Observatory |
SGO Riometer Networks
Active spectral riometer stations (07/2022):
| station | start of operation | geographic co-ordinates | L-val. | MHz | timing |
|---|---|---|---|---|---|
| KEVO | 09/2020 | 69.75°N 27.02°E | 6.5 | 20-55.0 | GPS 10MHz ref. |
| ABISKO | 09/2019 | 68.40°N 18.90°E | 5.6 | 20-55.0 | GPS 10MHz ref. |
| IVALO | 10/2020 | 68.55°N 27.28°E | 5.5 | 20-55.0 | GPS 10MHz ref. |
| SODANKYLÄ | 03/2019 | 67.42°N 26.39°E | 5.1 | 20-55.0 | GPS 10MHz ref. |
| OULU | 06/2019 | 65.08°N 25.90°E | 4.3 | 20-55.0 | GPS 10MHz ref. |
| JYVÄSKYLÄ | 09/2021 | 62.42°N 25.28°E | 4.3 | 20-55.0 | GPS 10MHz ref. |
| KILPISJÄRVI | 10/2022 | 69.07°N 20.75°E | 6 | 20-55.0 | GPS 10MHz ref. |
Active La Jolla riometer stations (07/2022):
| station | start of operation | geographic co-ordinates | L-val. | MHz | timing | AD converter | sampling | temp record |
|---|---|---|---|---|---|---|---|---|
| IVALO | 1994 | 68.55°N 27.28°E | 5.5 | 29.9 (-29.1.2018) 30.0 (29.1.2018-) | GPS | 16-bit | 10 Hz | yes |
| SODANKYLÄ | 1994 | 67.42°N 26.39°E | 5.1 | 30.0 | GPS | 16-bit | 10 Hz | yes |
| 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 |
All the active La Jolla riometers have dual half-wavelength dipole antenna, which forms 60 ° wide beam.
Table of SGO 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 |
Historical table of riometers operated by SGO:
| station | oper. since | geographic co-ordinates | L-val. | MHz | type | BW kHz |
| 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: |
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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)