CS ACNS.E.RVSM.035 Altimetry system accuracy

• ED Decision 2022/008/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

CS ACNS.E.RVSM.035 Altimetry system accuracy ED Decision 2022/008/R (See [AMC1 ACNS.E.RVSM.035](#_DxCrossRefBm573002879) and [GM1 ACNS.E.RVSM.035](#_DxCrossRefBm573002878)) (a) For group aircraft, the altimetry system accuracy meets the following criteria throughout the full envelope: (1) At the point of the flight envelope where the mean altimetry system error (ASEmean) reaches its largest absolute value, that value does not exceed 25 m (80 ft); and (2) At the point of the flight envelope where the absolute mean ASE (ASEmean) plus three standard deviations of ASE (ASE3SD) reach their largest absolute value, the absolute value does not exceed 60 m (200 ft). Examples of methods to establish and monitor static-source errors for group aircraft are provided in [Appendix B](#_DxCrossRefBm573002877) – Examples of methods to establish and monitor static-source errors (group aircraft only). (b) For RVSM installations on a non-group aircraft, the altimetry system accuracy meets the following criteria: (1) For all conditions in the basic envelope: | residual static source error +worst case avionics | does not exceed 50 m (160 ft). (2) For all conditions in the full envelope (outside the basic envelope): | residual static source error +worst case avionics | does not exceed 60 m (200 ft). [Issue: CS-ACNS/4]