The purpose of this Market Survey is to solicit industry input to support FAA efforts in developing the Airspace Non-cooperative Surveillance Radar (ANSR) acquisition strategy, further defining the requirements and technical approach, and developing a strategy for an eventual ANSR procurement.This announcement is being issued in accordance with the FAA Acquisition Management System (AMS) Section 3.2.1.2.1.__________________________________The purpose of amendment 1 is to include Attachments 2 and 3 referenced in the original market survey.__________________________________The purpose of this amendment 2 is to provide the questions from industry and the FAA's answers. __________________________________The purpose of this amendment 3 is to extend the necessary response date to March 13,