page_title: Mapping of Venus
section_title: Proposed future InSAR mapping
hierarchical_section_title: Mapping of Venus / Overview / Proposed future InSAR mapping
caption_attribution_description: English: Screenshot of an animation from a NASA website. The animation demonstrates an "InSAR satellite" measuring small scale changes in the earths crust.
context_page_description: The mapping of Venus refers to the process and results of human description of the geological features of the planet Venus. It involves surface radar images of Venus, construction of geological maps, and the identification of stratigraphic units, volumes of rock with a similar age.
  Satellite radar provides imagery of the surface morphology by using the physical properties of wave reflection. Long wavelength microwaves are used to penetrate the thick, cloudy atmosphere of Venus and reach to the surface. Different surface features reflect waves with different strengths of signal, producing images from which the maps are constructed.
  After collection of the images of the Venusian surface, scientists started to map and identify different geologic materials and units according to distinctive surface features. Different groups of scientists analysed different mapping areas, schemes and interpretation of features observed, to produce a classification of the units and comparison of their mapping.
context_section_description: The use of Interferometric synthetic aperture radar (InSAR) for mapping Venus has been proposed.
  Instead of surface mapping by SAR as done by previous missions, InSAR would measure the terrain motions during events such as earthquakes or tectonic movements. By performing the radar mapping at two separated times (before and after an event) over the same area, the terrain changes could be revealed.
caption: Hypothetical satellite using  InSAR to measure small scale earthquakes
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