File:Space radar image of Dublin.jpg

English: This radar image of Dublin in Ireland, shows how the radar distinguishes between densely populated urban areas and nearby areas that are relatively unsettled. In the centre of the image is the city's natural harbour along the Irish Sea. The pinkish areas in the centre are the densely populated parts of the city and the blue/green areas are the suburbs. The two ends of Dublin Bay are Howth, the D-shaped peninsula near the upper right side of the image, and Dún Laoghaire, at the end of the C-shaped bay to the south. The small island just north of Howth is called Ireland's Eye, and the larger island, near the upper right corner of the image is Lambay Island. The yellow/green mountains in the lower left of the image (south) are the Dublin and Wicklow Mountains. The large lake in the lower left, nestled within these mountains, is the Poulaphouca Reservoir along the River Liffey. The River Liffey, the River Dodder, and the River Tolka are the three rivers that flow into Dublin. The straight features west of the city are the Grand Canal and the three rivers are the faint lines above and below these structures. The dark X-shaped feature just to the north of the city is Dublin Airport. The image shows the coast from the town of Skerries in the north to the bulging headland called Bray Head in the south.

The image was acquired by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture (SIR-C/X-SAR) when it flew aboard the space shuttle Endeavour during the STS-59 mission on 11 April 1994. This area is centred at 53.3 degrees north latitude, 6.2 degrees west longitude. The area shown is approximately 55 kilometres by 42 kilometres (34 miles by 26 miles). The colours are assigned to different frequencies and polarizations of the radar as follows: Red is L-band horizontally transmitted, horizontally received; green is L-band vertically transmitted, vertically received; and blue is C-band vertically transmitted, vertically received. SIR-C/X-SAR, a joint mission of the German, Italian, and the United States space agencies, is part of NASA's Mission to Planet Earth.