1/18/2021 Memorandum on Space Policy Directive 7 | The White House (a) sustainment and modernization of the Global Positioning System (GPS) and federally developed, owned, and operated systems used to augment or otherwise improve GPS; (b) implementation and operation of capabilities to protect United States and allied access to and use of GPS for national, homeland, and economic security, and to deny adversaries hostile applications use of United States spacebased PNT services; and (c) United States participation in international cooperative initiatives regarding foreign space-based PNT services and foreign use of GPS and its augmentations. Sec. 2. Definitions. For purposes of this document: (a) “PNT service” refers to any system, network, or capability that provides a reference to calculate or augment the calculation of longitude, latitude, altitude, or transmission of time or frequency data, or any combination thereof. (b) “Primary PNT Service” refers to an independent PNT service chosen by a user or system operator as the preferred source of PNT information. A primary PNT service is expected to provide su icient accuracy, availability, integrity, or other characteristics important to the user. (c) “Augmentation” refers to any system that provides users of PNT signals with additional information that enables users to obtain enhanced performance when compared to the un-augmented signals from a primary PNT service alone. These improvements include improved accuracy, availability, integrity, and reliability, and independent integrity monitoring and alerting capabilities for critical applications. Augmentation systems inherently rely on a primary PNT service to operate. https://www.whitehouse.gov/presidential-actions/memorandum-space-policy-directive-7/ 3/24