PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-17:57:30
G02     205.8          35.9               15.6 +/-    1.46      24.4 +/-    1.46  0.030 / 0.060
G06     148.3          74.2               11.7 +/-    0.86      12.1 +/-    0.86  0.030 / 0.070
G12     310.9          20.3               10.5 +/-    1.91      23.0 +/-    1.91  0.190 / 0.250
G17     43.0           43.4                9.6 +/-    0.75      13.3 +/-    0.75  0.090 / 0.280
G19     15.9           60.9               10.1 +/-    0.55      11.4 +/-    0.55  0.060 / 0.080
G24     294.3          39.3                9.5 +/-    3.00      14.0 +/-    3.00  0.060 / 0.090
G28     107.6          27.6               10.5 +/-    1.38      19.3 +/-    1.38  0.040 / 0.030