In an effort to modernize the GPS constellation, modifications are being made to the GPS space and ground control segment. These changes should be transparent to IS-GPS-200 compliant receivers, however, commercial and civilian users who experience impacts are encouraged to contact the Navigation Centeror by phone at (703) 313-5900.
Announcement of the annual Public Interface Control Working Group and public forum to address changes to GPS public interface documents has been published. On 12 September 2018 the GPS Program Office will propose several changes to the Public Interface Control Documents concerning GPS users. GPS users, equipment manufacturers, and other stakeholders are encouraged to attend and participate in the process.