2013 06 19 42 50

Considenng Eqs. 7.2 and substituting appropriate values, one gets fromE<qs. 7.V.

6. sin a₂. sin (v„ - a,)

y _ JL + ---

^A    sin (a, + a₂)

_w &sina₂.sin (v₁₂

y — Yt + —^---    y—

¹    sin(a₁+cx₂)    V-

Equations 7.3 contain information obtainable from the two base stations and the h length. The partial derivatives of Eqs 7.3 give:

d X    fr.sina₂.sin(v₁₂ ła₂)

d ^    sin² y    ^

d X b.sin aj.sin (v₁₂ - aj)

* "    sin² y