Keywords: Javad Positioning System antenna atop the Washington Monument.jpg by NOAA A Javad Positioning System antenna atop the Washington Monument Looking west with the Lincoln Memorial in the background 1999 http //www photolib noaa gov/htmls/geod0566 htm National Oceanic Atmospheric Administration NOAA ;References http //www ngs noaa gov/surveys/ngs/wm1999/ Washington Monument GPS Height Modernization Project August 17 - 19 1999 PD-USGov Uploaded with UploadWizard Washington Monument Surveying instruments GPS antennas |