To deviate from RTCA DO-260B Test 2.4.6.1.2 – Step 2 and to test the equipment with regard to bursts only to the actual behavior of a current (year 2015) TIS-B implementation in the US and to limit the use of the TIS function to the US.
Clarification on the limited validity of equation (A-22) and (A-22a) proposed by DO-229(A,B,C,D) for the ionospheric pierce point location computation and provision of a formula which does not have that limitation.