Here we delineate a complete satellite-based augmentation system (SBAS) authentication scheme. including over-the-air rekeying (OTAR). that uses the elliptic curve digital signature algorithm (ECDSA) and timed efficient stream loss-tolerant authentication (TESLA) without the quadrature (Q) channel. This scheme appends two new message types to the SBAS scheduler without over-burdening ... https://www.roneverhart.com/AMS-Neve-1073SPX-Single-Preamp-and-EQ-p33827/