Waves in the plasma depletion layer derived from three magnetosheath passes made by WIND

摘要: Abstract We analyze theoretically wave activity in the plasma depletion layer (PDL) based on measurements made by WIND spacecraft 3 passes of magnetosheath at low, southern magnetic latitudes and within 1 hour noon. The occurred November 30, December 12, 24, 1994. They were under moderate-to-low solar wind dynamic pressure, allowing a characterization near-subsolar PDL typical conditions. Magnetic fluctuations transverse to background field characteristic electromagnetic ion cyclotron waves are present all PDLs we illustrate this 1994 pass. estimate numerically excitation, using measured parameters supplementing these average values for those other which not available. increases as magnetopause is approached, except 30. interplay proton thermal anisotropy beta parallel field, quantities anticorrelated, may be used explain major similarities differences theoretical results respective passes. These only near subsolar region pressure have been examined date, ones locale Wind.