CONTENTS

Introduction
  On the nature of 3 minute oscillations above Sunspots
  Sunspot wave propagation
  Transition region structure
  Reflection due the temperature gradient
CDS/TRACE Observations of transition region lines
  Observational setup
  Raster details
  NIS observations
  GIS observations
  TRACE observations
  TRACE sensitivity
Simulations of transition region sunspot oscillations
   Simulation setup
  Simulation results
  Conclusions