PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-12:58:10
G01     118.5          18.1                5.5 +/-    1.97      12.7 +/-    1.97  0.130 / 0.100
G07     85.9           63.6                5.2 +/-    0.46       5.7 +/-    0.46  0.110 / 0.100
G08     44.4           29.3                3.4 +/-    1.67       6.1 +/-    1.67  0.030 / 0.020
G09     175.2          23.6                4.2 +/-    0.83       8.4 +/-    0.83  0.030 / 0.030
G11     103.3          38.6                4.7 +/-    0.80       7.1 +/-    0.80  0.280 / 0.370
G13     318.5          17.9                5.0 +/-    3.87      11.7 +/-    3.87  0.120 / 0.210
G17     201.0          27.4                4.5 +/-    2.07       8.4 +/-    2.07  0.040 / 0.030
G28     293.9          57.4                3.0 +/-    1.34       3.5 +/-    1.34  0.040 / 0.030
G30     343.4          67.1                4.4 +/-    0.48       4.7 +/-    0.48  0.130 / 0.090