TY - STD AU - Bondar T N, Golovkov V. P. PY - 1992// TI - IZMIRAN Candidate Models for DGRF 1985, IGRF 1990 and a Secular Variation Forecast Model for the 1990-1995 Period BT - Journal of geomagnetism and geoelectricity SP - 709 EP - 717 VL - 44 IS - 9 N2 - Two candidate main field models for 1985 and 1990 as well as a forecast for the secular variation are represented as a series of spherical harmonic coefficients up to n=m=10 and n=m=8, respectively. IZMSV, US/UK, USGS forecasting models are compared with extrapolated secular variation observations and with one another. The IZMSV and the USGS are shown to agree best. SN - 0022-1392 UR - http://dx.doi.org/10.5636/jgg.44.709 N1 - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=291), last updated on Tue, 30 Nov 1999 00:00:00 +0100 ID - BondarTN1992 ER -