The Magellan Global Slope Data Record (GSDR) archive contains slope data acquired by the Magellan spacecraft during its mission to Venus.

 
Citation Ford, P. G., MGN V RDRS 5 GLOBAL DATA RECORD SLOPE V1.0, MGN-V-RDRS-5-GDR-SLOPE-V1.0, NASA Planetary Data System, 1992
Data Set Abstract This data set contains the Magellan Global Slope Data Record (GSDR). The surface meter-scale slopes are derived by fitting altimeter echoes from the fan-beam altimetry antenna as a function of time to Hagfors' radar backscatter model templates. The data are then re-sampled into sinusoidal, Mercator, and north and south polar stereographic projections at a resolution of about 5x5 kilometers per pixel. Each GSDR image pixel is represented by a 8-bit unsigned integer.
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    Additional Information
    Mission Information MAGELLAN
    Data Set Information MGN-V-RDRS-5-GDR-SLOPE-V1.0
    Instrument Host Information MGN
    Instrument Information RDRS
    Target Information VENUS