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We present radio continuum images of three Galactic HII regions, S 201, S206, and S 209 near 232, 327, and 610 MHz using the Giant Meterwave RadioTelescope (GMRT). The GMRT has a mix of short and long baselines, therefore,even though the data have high spatial resolution, the maps are still sensitiveto diffuse extended emission. We find that all three HII regions have brightcores surrounded by diffuse envelopes. We use the high resolution afforded bythe data to estimate the electron temperatures and emission measures of thecompact cores of these HII regions. Our estimates of electron temperatures areconsistent with a linear increase of electron temperature with Galacto-centricdistance for distances up to 18 kpc (the distance to the most distant HIIregion in our sample).Comment: Accepted for publication in Astronomy & Astrophysics, 13 figures, 6  pages, Late

Multi-frequency GMRT observations of the HII regions S 201, S 206, and S 209