TY - JOUR A1 - Kavanagh, A. J. A1 - Marple, S. R. A1 - Honary, F. A1 - McCrea, I. W. A1 - Senior, A. T1 - On solar protons and polar cap absorption: constraints on an empirical relationship JO - Ann. Geophys. J1 - ANGEO VL - 22 IS - 4 SP - 1133 EP - 1147 Y1 - 2004/04/02 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/22/1133/2004/ L1 - https://angeo.copernicus.org/articles/22/1133/2004/angeo-22-1133-2004.pdf DO - 10.5194/angeo-22-1133-2004 ER -