IRIS - Imaging Riometer at Ny Ålesund, Svalbard for Ionospheric Studies

Thank you for your interest in the imaging riometer data at Ny Ålesund.
Please read this file carefully before using the database.

             IRIS Absorption Data Plots 

       YEAR                           MONTH
             1   2   3   4   5   6   7   8   9  10  11  12
       1991  N   N   N   N   N   N   N   N   Y   Y   Y   Y
       1992  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y
       1993  Y   Y   Y   Y   Y   Y   Y   N   N   N   N   Y
       1994  Y   Y   Y   Y   Y   Y   Y   N   Y   Y   Y   Y
       1995  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y
       1996  Y   Y   Y   N   Y   Y   Y   Y   Y   Y   Y   Y
       1997  Y   Y   Y   N   Y   Y   Y   Y   Y   Y   Y   Y
       1998  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y
       1999  Y   Y   Y   Y   N   N   N   N   Y   Y   Y   Y
       2000  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y
       2001  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y
       2002  Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   Y   N
       2003  Y   Y   Y   Y   Y   Y   Y   Y   Y   N   N   N

Acknowledgement

The IRIS observations are carried out by the incessant support of Norwegian Polar Institute, to which we greatly acknowledge. I would like to acknowledge T. Oguti, Y. Tanaka, retired scientists of STEL and A. Egeland, J.A. Holtet, Oslo University for encouragements of the IRIS observations at Ny Ålesund. I acknowledge H. Yamagishi, National Institute of Polar Research (NIPR), P. Stauning, Danish Meteorological Institute (DMI) for helpful discussions of the IRIS system, and T. Ogawa and T. Ogino, STEL for the support of database processing. Finally, thanks are due to Mr/Mrs Ikegami, Moshiri Observatory, STEL for the work of database processing.

References

Armstrong, R., J. Berry, F. T. Merbye: The day to night absorption ratio in auroral zone riometer measurements, Planetary Space Science, 25, 1193-1198, 1977.
Detrick, D.L., and T.J. Rosenberg: A phased-array radio wave imager for studies of cosmic noise absorption, Radio Science, 325-338, 1990.

Publications

Yamagishi, H., M. Nishino, M. Sato, Y. Kato, M. Kojima, N. Sato, and T. Kikuchi: 
    Development of imaging riometers, Antarctic Records, 36, 2, 227-250, 1992 
    (in Japanese with English abstract).
Sato, M., H. Yamagishi, Y. Kato, and M. Nishino: Quick-look system of auroral 
    absorption images by imaging riometer, Antarctic Records, 36, 2, 251--267, 
    1992 (in Japanese with English abstract).
Nishino, M., Y. Tanaka, T. Oguti, H. Yamagishi and J.A Holtet: Initial observation 
    results with imaging riometer at Ny-Alesund (L=16), Proc. NIPR, Upper Atmos. 
    Phys., 6, 47-61, 1993
Stauning, P., H. Yamagishi, M. Nishino, and T.J. Rosenberg: Dynamics of cusp-latitude
    absorption events observed by imaging riometers, J. Geomag. Geoelectr, 47, 823-846, 
    1995
Nishino, M., H. Yamagishi, P. Stauning, T.J. Rosenberg and J.A. Holtet: Location, 
    spatial scale and motion of radio wave absorption in the cusp-latitude ionosphere 
    observed by imaging riometer, J. Atmos. Solar-Terr. Phys. 59, 4, 903-924, 1997
Murayama, Y., H. Mori, S. Kainuma, M. Ishii, I. Nishimuta, K. Igarashi, H. Yamagishi and
    M. Nishino: Development of high-resolution imaging riometer for the middle and 
    upper atmosphere observation program at Poker Flat, Alaska, J. Atmos Solar-Terr.
    Phys. 59, 8, 925-937, 1997
Nishino, M., S. Nozawa and J.A. Holtet: Daytime ionospheric absorptions in the polar 
    cap associated with poleward drifting F-region plasma patches, Earth, Planets 
    and Space, 50, 2, 107-117, 1998
Nishino, M., H. Yamagishi, N. Sato, Y. Sanoo, L. Ruiyuan, H. Honquao and P. Stauning:
    Initial results of imaging riometer observations at polar cap conjugate stations, 
    Proc. NIPR Sympo. Upper Atmos. Phys., 12, 58-72, 1998
Nishino, M., N. Gorokhov, Y. Tanaka, H. Yamagishi, and T. Hansen: Probe experiment
    characterizing 30 MHz radio wave scatter in the high-latitude ionosphere, 
    Radio Science, 34, 4, 883-898, 1999
Nishino, M., N. Nishitani, N. Sato, H. Yamagishi, M. Lester, J.A. Holtet: A rectified 
    response of daytime radio wave absorption to southward and northward excursions 
    during northward interplanetary magnetic field: a case study, Advances in Polar 
    Upper Atmos. Res., 13, 139-153, 1999 
Nishino, M., H. Yamagishi, N. Sato, Y. Murata, L. Ruiyan, H. Honquao, P. Stauning, 
    and J.A. Holtet: Post-noon ionospheric absorption observed by imaging riometers 
    at polar cusp/cap conjugate stations, Chinese Journal of Polar Science, 10, 2, 
    125-132, 1999
Nishino, M., H. Yamagishi, N. Sato, L. Ruiyuan, H. Honquao, P. Stauning, and J.A. 
    Holtet: Conjugate features of daytime absorption associated with specific changes 
    in the solar wind observed by inter-hemispherical high-latitude imaging riometers, 
    Adv. Polar Upper Atmos. Res., 14, 76-92, 2000
Yamagishi, H., Y. Fujita, N. Sato, M. Nishino, P. Stauning, R. Lui and T. Saemundsson:
    Interhemispheric conjugacy of aurora poleward expansion Observed by conjugate 
    imaging riometers at ~67 and 75-77 invariant latitude, Adv. Polar Upper Atmos. 
    Res., 14, 12-33, 2000
Nishino, M., H. Yamagishi, N. Sato, Y. Murata, R. Liu, P. Stauning, and J.A. Holtet:
    Conjugate imaging riometer observations at polar cusp/cap stations: A daytime 
    absorption event for a specific change of solar wind conditions, Memo. Natl. 
    Inst. Polar Res., Special issue (Environmental Research in the Arctic, 2000), 
    54, 29-41, 2001.
He, L., M. Nishino, B. Zhang, L. Liu, Y. Liu, S. Liu, H. Hu, N. Sato, and H. Yamagishi,
    Absorption events associated with solar flares, Chinese Science Bulletin, 46, 5, 
    369-372, 2001.
Nishino, M., K. Makita, K. Yumoto, F. Rodrigues, N.J. Schuch and M. Abdu, Unusual 
    ionospheric absorption characterizing energetic electron precipitation into the 
    South Atlantic Anomaly, Earth, Planets and Space, 54, 907-916, 2002.