%                             pionoc.m
%  Scope:   This MATLAB macro computes pseudorange measurement corrected for
%           ionospheric effects when pseudoranges measured on L1/L2 are
%           available.
%  Usage:   pr = pionoc(pr1,pr2)
%  Description of parameters:
%           pr1  - input, pseudorange measured on L1
%           pr2  - input, pseudorange measured on L2
%           pr   - output, pseudorange corrected for ionospheric effects
%  Last update:  06/07/99
%  Copyright (C) 1996-99 by LL Consulting. All Rights Reserved.

function  pr = pionoc(pr1,pr2)

temp = 7.7/6.;                 %      L1/L2 = 1575.42/1227.6
gamma = temp * temp;
pr = (pr2 - gamma*pr1)/(1. - gamma);