The Magellan Compressed Mosaicked Image Data Record (C2-MIDR) archive contains twice-compressed mosaics of image swaths (C-BIDRs) at a resolution of 675 m/pixel.

Citation Pettengill, G., MGN V RADAR SYSTEM DERIVED MIDR COMPRESSED TWICE V1.0, MGN-V-RDRS-5-MIDR-C2-V1.0, NASA Planetary Data System, 1992
Digital Object Identifier (DOI) 10.17189/1522527
Data Set Abstract This data set contains the Magellan Compressed Twice Mosaicked Image Data Records (C2-MIDRs) which consists of mosaics generated by computing 3x3 pixel arithmetic moving averages from the C1-MIDRs. Each C2-MIDR is in a sinusoidal equal area projection and has an origin at 0 degrees latitude, with the central meridian defined as the longitude bisecting the mosaic. Each C2-MIDR has 7168 lines (aligned with latitudes) and 8192 samples, arranged as 56 1024x1024 files on CD-ROM. C2-MIDRs, with their 675 m pixel widths, are designed to cover the planet at reasonably high resolution and high signal to noise ratio.
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    Additional Information
    Mission Information MAGELLAN
    Data Set Information MGN-V-RDRS-5-MIDR-C2-V1.0
    Instrument Host Information MGN
    Instrument Information RDRS
    Target Information VENUS