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Results are presented of a comparison between solar wind speed estimates madeusing the time delays between 3 pairs of 327 MHz antennas at ISEE and estimatesmade by modeling the temporal power spectra observed with the 111 MHz BSAantenna at LPI. The observations were made for 6 years in the descending phaseof solar cycle 24. More than 100 individual records were obtained for thecompact source 3C48 and the extended and anisotropic source 3C298. Thecorrelation between the daily speed estimates from 3C48 is 50%. Their annualaverages agree within the error estimates and show the expected solar cyclevariation. However the correlation between speeds from 3C298 is only 25% andtheir annual averages do not agree well. We investigate possible causes of thisbias in the 3C298 estimated speeds.

Comparison of solar wind speed estimates from nearly simultaneous IPS observations at 327 and 111 MHz