How many pictures were taken of the “face”?
As many as 18 images of the region were taken by the Viking 1 and 2 orbiters, but only seven have resolutions better than 250 m/pixel. The other 11 images have resolutions worse than 550 m/pixel and are virtually useless for studying the feature. Of the seven “good” images, the lighting and time at which two pairs of images were taken are so close as to reduce the number to five usable, distinct images. All five of these can be seen at the NSSDC Photo Gallery in raw and processed forms as JPEGS. They are also available as TIFF files in the raw form only on the NSSDC Photo Gallery FTP site for Mars images. Finally, they are available in PDS image format on the NSSDC’s FTP site for CD-ROMs. • Which images have the “face” on them? The best images of the “face” can be found in the following Viking images/CD-ROMs (cf. Mission to Mars: Viking Orbiter Images of Mars CD-ROMs): • 35A72 (VO-1010) • 70A13 (VO-1011) • 561A25 (VO-1021) • 673B56 & 673B54 (VO-1063) • 753A33 & 753A34 (VO-1028) The fir
