The new plasma impedance probe built by Utah State University was °own on July 1, 2003 as part of a NASA sounding rocket cam- paign to investigate midlatitude plasma layers and neutral winds. The instrument provided measure- ments of absolute and relative electron densities for the mission. The instrumentation technique is brie°y introduced, along with the plasma param- eters that the technique is capable of measuring. Relative electron densities from the DC Langmuir probe for the mission are presented along with a comparison of the relative density data to the ab- solute density provided by the plasma frequency probe