![Secure GPS Data for Critical Infrastructure and Key Resources: Cross‐Layered Integrity Processing and Alerting Service - Lewis - 2018 - NAVIGATION - Wiley Online Library Secure GPS Data for Critical Infrastructure and Key Resources: Cross‐Layered Integrity Processing and Alerting Service - Lewis - 2018 - NAVIGATION - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/68913b7f-9ea1-4fb6-a541-b149d7fe0257/navi251-fig-0002-m.jpg)
Secure GPS Data for Critical Infrastructure and Key Resources: Cross‐Layered Integrity Processing and Alerting Service - Lewis - 2018 - NAVIGATION - Wiley Online Library
![Q: What is the significance of the NANUs provided by GPS and the similar alerts provided by other GNSS constellations? Are they needed for the use of these systems, and if not, Q: What is the significance of the NANUs provided by GPS and the similar alerts provided by other GNSS constellations? Are they needed for the use of these systems, and if not,](https://insidegnss-com.exactdn.com/wp-content/uploads/2020/05/shutterstock_1088000534.jpg?strip=all&lossy=1&ssl=1)
Q: What is the significance of the NANUs provided by GPS and the similar alerts provided by other GNSS constellations? Are they needed for the use of these systems, and if not,
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