SESAR Wave 2 Developments in APNT

It is commonly agreed that alternative PNT services will play an increasing role in the future ATM. The threat from RFI, in the form of GNSS jamming and/or spoofing, is not easily quantifiable. Many authors have described its impact on systems, on the safety and efficiency of operations and many other perspectives; a quantitative assessment of the threat, however, remains elusive. As such, it seems self-evident that an alternate means of navigation will be required for future aviation users of GNSS-based services. The value of Solution 81 lies precisely in the further development of a set of technologies that have, in the past, shown strong potential for enabling that alternate capability, which is likely to support even the most demanding RNP types, like RNP-0.3.