TY - JOUR T1 - SBAS Protection Levels with Gauss-Markov K-Factors for Any Integrity Target JF - NAVIGATION: Journal of the Institute of Navigation JO - NAVIGATION DO - 10.33012/navi.594 VL - 70 IS - 3 SP - navi.594 AU - Julie Antic AU - Odile Maliet, AU - Sébastien Trilles Y1 - 2023/09/21 UR - https://navi.ion.org/content/70/3/navi.594.abstract N2 - According to aviation minimum operational performance standards (MOPS), protection levels for satellite-based augmentation systems (SBASs) are to be computed as the product of the estimated standard deviation of errors and a scaling, or K-factor. MOPS recognized that K-factors were originally chosen to be consistent with certain assumptions that may not hold under all conditions. Considering the limited applicability of aviation-based K-factors, it will be important to identify a more rigorous method for deriving new SBAS applications for road, rail, or maritime use. Here we describe an innovative method applicable to any integrity risk (e.g., at 10−7 for aviation or 10−5 for maritime applications) and time interval T (e.g., 150 seconds to 1 hour for aviation or 3 hours for maritime use). This new method relies on rigorous probability justification. No restrictive assumptions are needed for the time correlation pattern of the errors. The method is easy-to-implement and applicable to any type of integrity risk or time interval T. ER -