The Solar Acoustic Spectrum and Eigenmode Parameters     

F Hill  PB Stark  RT Stebbins  ER Anderson  HM Antia  TM Brown  TL Duvall  DA Haber  JW Harvey  DH Hathaway  R Howe  RP Hubbard  HP Jones  JR Kennedy  SG Korzennik  AG Kosovichev  JW Leibacher  KG Libbrecht  JA Pintar  EJ Rhodes  J Schou  MJ Thompson  S Tomczyk  CG Toner  R Toussaint  WE Williams 《Science (New York, N.Y.)》1996,272(5266):1292-1296

The Global Oscillation Network Group (GONG) project estimates the frequencies, amplitudes, and linewidths of more than 250,000 acoustic resonances of the sun from data sets lasting 36 days. The frequency resolution of a single data set is 0.321 microhertz. For frequencies averaged over the azimuthal order m, the median formal error is 0.044 microhertz, and the associated median fractional error is 1.6 x 10(-5). For a 3-year data set, the fractional error is expected to be 3 x 10(-6). The GONG m-averaged frequency measurements differ from other helioseismic data sets by 0.03 to 0.08 microhertz. The differences arise from a combination of systematic errors, random errors, and possible changes in solar structure.  相似文献