A new feature of electric field frequency-time spectrograms observed on the S3-3 satellite, the resonance fingerprint, is used to determine the polarization, frequency, and wavelengths of high-latitude turbulence. It is found that in the rest frame of the plasma the frequency is approximately zero, the wavelength may be as small as 5 m, and the electric field is polarized in the plane normal to the magnetic field. Consequently, the power spectrum below a few hundred hertz as measured by a satellite is dominated by the Doppler shift of zero frequency turbulence. The resonance fingerprint is a characteristic pattern of bite-outs in the electric field power spectrum which repeats at twice the spin frequency of the satellite. The bite-out, an interference effect, is a consequence of the fact that a double probe is insensitive to wavelengths such that the double-probe separation is an integral multiple of wavelength.