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Global Positioning System Next Generation Operational Control System (GPS OCX)

Advanced. Protected. Connected.

Planned benefits of the new GPS OCX:

Dramatic Performance Improvement

The GPS system and the critical navigation information it provides are measured by accuracy, availability and integrity. By all three measures, the new GPS OCX system is scheduled to deliver enormous improvements and enhancements, dramatically increasing the performance and effectiveness of the entire GPS system. For example, the new Kalman filter that is at the heart of the GPS OCX navigation solution will double the accuracy of the current system for all users. GPS OCX will lift the cap on the number of satellites in the GPS constellation, allowing more satellites and better geometry in hard-to-reach areas such as urban canyons and mountainous terrain. Additionally, all critical OCX external interfaces will employ digital signatures, protecting information from tampering so it can be trusted by users.

Unparalleled Cyber Protection

With cyberthreats to U.S. military, civilian, corporate and financial infrastructure growing exponentially, as well as becoming much more sophisticated, it is critical that the GPS system be fully secure and protected from hacking, interruption or signal and information compromise. The new GPS OCX system is at the forefront of implementing DODI 8500.2 Information Assurance Standards that provide a multilayered Defense in Depth security controls to protect the GPS mission from a spectrum of threats. OCX will raise the level of protection using an arsenal (or suite) of technologies and techniques compliant with the best practices and standards of the U.S. military and government cybersecurity experts.

Unparalleled Cyber Protection

Most importantly, the system is being designed with robust security and information assurance built in, enabling integration with every single aspect of the system. These new information assurance provisions in GPS OCX will result in the most secure ground program possible.

Enabling Secure Information Sharing

In today's hyper-connected world, where almost everything can be viewed as a node on some network, it is essential to be able to share information with whoever needs it — securely, quickly and automatically. In the past, valuable system information (such as timely clock and satellite position corrections) was only available through rigid, point-to-point interfaces to a very small number of specific users. GPS OCX will evolve to a single, net-centric interface that enables secure and authenticated sharing of valuable system information with a broad range of certified, net-connected users. Since it can be used quickly and accurately when and where it is needed, the system will significantly improve timeliness and quality of service. The planned system will also be backward compatible with existing point-to-point interfaces for current users.

Effective Use of the Most Modern Civil and Military Signals

One of today's key GPS challenges is the current operational control system cannot process the latest types of navigation signals to allow them to be operationally available for military and civilian GPS users. Although there are nearly a dozen satellites in orbit capable of broadcasting the new M-code military signal, the current control system is not capable of bringing them online.

At one time, the U.S. GPS system was the only system of its type in the world. That is no longer the case. GPS OCX enables the new internationally compatible L1C signal that is focused on the civil user community.

GPS OCX will also employ a new architecture that works with both legacy and new types of signals to enable full utilization of current signal capabilities. For example, besides M-code and L1C, the current control system also cannot process L2C and L5 signals; all of these are planned capabilities for by GPS OCX. Activation of the new civil signals will bring the same multiple-frequency capabilities to civil and commercial users that have been available to military users for years. By eliminating atmospheric distortions and allowing signal redundancy to mitigate radio frequency interference, the new system will be 10 times more accurate.

A Flexible, Open Architecture Built for the Future

Unlike previous generations of GPS ground systems, which were built on proprietary, closed architectures, the new GPS OCX ground system represents a departure from the past and a major leap forward into the future of technology. By embracing an open system, service-oriented architecture, modular sub-systems and the ability to integrate new capabilities and signals easily as they become available, the new GPS OCX ground system will deliver enhanced solutions and advantages in flexibility to meet future needs. It will also save the U.S. government money in the future by reducing the crew size required for day-to-day operations through automation as well as eliminating the need to re-architect the system as the GPS mission evolves.

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