Solar cycle variation in GONG and MDI data: 1995-2002

Abstract

Both GONG and MDI projects have measured {\it p}-mode frequencies of the Sun for more than 7 years. Here we review what we have learnt from the temporal variation of the oscillation frequencies and splitting coefficients.

6 pages, Latex (requires Basi.sty), invited review presented in the annual meeting of ASI (2003)