TRAVEL TIME IN A LAYER WITH CONSTANT GRADIENT (with Tables of Anti-gudermannians for 0°to 23°)

摘要

The equation for the travel time in the i-th layer with constant gradient g^ is t = (-1/gi)Several ways of evaluating the integral are discussed, the most practical being the method of anti-gudermannlans since it uses data already at hand from ray. tracing.nSeven-place tables of this function are given for annargument in decimal degrees, and it is shown that linearninterpolation is sufficiently accurate