2F(P) RADIO-EMISSION FROM THE VICINITY OF THE EARTHS FORESHOCK - WINDOBSERVATIONS

We analyze 2f(p) radio emission observed during a perigee pass in Augu st 1995 when the WIND spacecraft was between 47 and 72 R(E) from Earth and upstream of the electron foreshock. The WAVES experiment on WIND measures the direction of arrival and complete polarization state of t he 2f(p) radiation. We found no evidence for significant linear or cir cular polarization. For one period when we were able to utilize the di rection finding capability to determine the actual 2f(p) source locati on, using an interplanetary shock as a diagnostic, the radio emitting region was confirmed to lie within the electron foreshock near the con tact point. We indicate how such remotely observed 2f(p) emissions can be used to monitor the response of the electron foreshock to instanta neous changes in the interplanetary magnetic field.