PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-12:13:10
G01     124.6          13.5                3.9 +/-    1.40      10.0 +/-    1.40  0.090 / 0.070
G07     67.5           67.0                4.2 +/-    0.56       4.5 +/-    0.56  0.070 / 0.090
G08     47.8           35.5                2.4 +/-    1.03       3.7 +/-    1.03  0.040 / 0.030
G09     175.7          30.8                4.5 +/-    1.31       7.7 +/-    1.31  0.030 / 0.020
G11     112.4          35.6                4.0 +/-    0.90       6.3 +/-    0.90  0.030 / 0.030
G13     321.2          12.0                1.0 +/-   10.93       2.6 +/-   10.93  0.030 / 0.030
G17     199.6          20.0                4.2 +/-    1.43       9.3 +/-    1.43  0.250 / 0.430
G28     281.2          54.3                2.6 +/-    2.32       3.2 +/-    2.32  0.320 / 0.480
G30     333.8          61.0                1.9 +/-    0.70       2.1 +/-    0.70  0.150 / 0.200