PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-16:43:00
G01     55.6546        28.4036          8.9736 +/-  0.7828   16.2550 +/-  0.7828  0.090 / 0.170
G06     178.8615       19.3529         12.5399 +/-  1.2786   28.0321 +/-  1.2786  0.070 / 0.140
G11     45.7024        17.3513          8.1062 +/-  0.9455   19.0349 +/-  0.9455  0.040 / 0.050
G13     259.6775       33.3339         11.7207 +/-  1.3908   19.1967 +/-  1.3908  0.040 / 0.050
G15     293.7291       15.3304          8.9065 +/-  1.8261   21.9764 +/-  1.8261  0.030 / 0.070
G17     291.2821       79.9357         12.2885 +/-  0.5796   12.4607 +/-  0.5796  0.030 / 0.080
G19     238.5061       56.7779         11.8518 +/-  1.1910   13.8690 +/-  1.1910  0.120 / 0.320
G28     42.6370        55.1934         10.4076 +/-  0.5368   12.3757 +/-  0.5368  0.140 / 0.390
G30     146.2639       50.5542         13.4998 +/-  0.5705   16.9107 +/-  0.5705  0.110 / 0.220