NATCA Bookshelf

• The SPA WG has developed a draft list of 18 candidate sites for full removal. However, there are several that require more discussion and analysis. NATCA is working closely with the Agency on potential candidate sites. Another concern is the reliance on military radar sites to provide replacement coverage; these sites have historically had issues with availability and clutter. • NATCA and Ops Support SMEs from SBS have reviewed these 18 sites identified by the SPA WG. With assumptions made about military radar availability, ADS-B availability, overlapping radar coverage and more the team found seven sites to be potential candidates. The SBS Article 114 work group continues to dig into the potential removal sites for consensus. This is only a high-level review and any actual decisions would occur post-2020 with local facility engagement. • An SRM Panel concluded that partial removal (only secondary or primary radar) actually resulted in higher risks than complete removal. This assumes that complete removal would only occur where the effects were minimized by other overlapping radar sources nearby. A subsequent panel meeting concluded that ATC services would need to remain identical from a high-level perspective. Only at the local level can determinations be made to compromise on today's coverage. Terminal Fusion • The Fusion focus group continues to track and resolve facility reported issues with Fusion. These issues are largely with the underlying surveillance infrastructure, and experts from all fields are available to assist. Please report any issues to your OSF and our NATCA SBS group for assistance. It is critical that actual data is recorded for evaluation and resolution. • SCT has what has been described as the worst radar environment in the NAS. A multi- faceted approach to remedy has been undertaken, including WAM, raising LGB radar, introducing other nearby radar feeds, STARS software changes, and radar software changes. In addition, SAAT is focused on mitigating tracking issues in the LA Basin due to the construction of a new NFL stadium on final approach to LAX. WAM remains disabled at this point due to continued false track issues. • SAAT has been analyzing Potomac (PCT) Fusion issues for potential solutions. The facility has been struggling with a number of issues related to problem radar sites or a lack of coverage. Radar analysis has confirmed the benefit of adding Quantico (NYG) radar to PCT as well as reducing obstructions near Dulles. Funding for the additional NYG feed has only recently been identified. • Raleigh-Durham (RDU) has suffered for far too long with tracking issues. A thorough analysis of the situation was provided in late 2017 showing that the RDU ASR itself is screened by tree growth. Efforts to reduce this screening are underway and the airport authority is awaiting a contractor. SBS has agreed to fund additional radar sensors to help with the Fusion presentation, but if the tree screening is not resolved their tracking issues will continue. • Systemwide changes to CLT are being worked to boost WAM availability. These include multiple redundant communication links from radios, network architecture improvements, and a closer examination of which radios are critical. This last step has

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