Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3810

c) use another approved method that ensures an equivalent level of safety. 14. Modelling of residual errors 14.1 Application of the integrity requirements for SBAS and GBAS requires that a model distribution be used to characterize the error characteristics in the pseudo-range. The HPL/LPL and VPL models (see 7.5.3) are constructed based on models of the individual error components (in the pseudo-range domain) that are independent, zero-mean, normal distributions. The relationship between this model and the true error distribution must be defined. ATT D-51 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 14.2 One method of ensuring that the protection level risk requirements are met is to define the model variance (ı2), such that the cumulative error distribution satisfies the conditions: y y y f(x)dx Q for all 0 and f § · § · d t ¨ ¸ ¨ ¸ V V © ¹ © ¹ ³ y y y f(x)dx Q for all 0 and  f § · § · d t ¨ ¸ ¨ ¸ V V © ¹ © ¹ ³ where f(x) = probability density function of the residual aircraft pseudo-range error; and 2t x Q(x) e dt. f  S ³ 14.3 This method can be directly applied when the error components have zero-mean, symmetrical and unimodal probability density functions. This is the case for the receiver contribution to corrected pseudo-range error, since the aircraft element is not subjected to low-frequency residual multipath errors. 14.4 This method can be extended to address non-zero-mean, residual errors by inflating the model variance to compensate for the possible effect of the mean in the position domain. 14.5 Verification of the pseudo-range error models must consider a number of factors including:

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