PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-14:27:50
G02     80.0           15.4                6.5 +/-    1.88      15.9 +/-    1.88  0.030 / 0.050
G05     44.6           38.6                5.8 +/-    1.03       8.6 +/-    1.03  0.050 / 0.040
G13     107.0          30.8                9.9 +/-    1.11      17.1 +/-    1.11  0.040 / 0.030
G15     147.7          33.5                9.2 +/-    1.14      15.0 +/-    1.14  0.030 / 0.030
G18     228.0          24.1                5.6 +/-    2.50      11.2 +/-    2.50  0.080 / 0.230
G20     258.7          83.3                7.0 +/-    0.56       7.0 +/-    0.56  0.100 / 0.270
G21     294.5          36.4                5.6 +/-    1.33       8.7 +/-    1.33  0.060 / 0.110
G25     212.2          30.6                6.6 +/-    2.56      11.3 +/-    2.56  0.060 / 0.110
G26     312.8          14.7              -16.8 +/-   24.51     -42.2 +/-   24.51  0.090 / 0.090
G29     18.9           83.5                6.6 +/-    0.44       6.6 +/-    0.44  0.100 / 0.090