17 Sep 2008 aerial-survey-base GPS (GNSS/IMU), Historic Blog Post before 2011 No Comments 17. September 2008 aerial-survey-base Ashtech Z12 GPS Receivers Ashtech Z12 GPS Receivers we got some factory refurbished GPS Receivers, please call. Note: posts 2008-2011 have been automatically imported from Blogger.com, links, format & structure may become broken.