PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-17:58:10
G02     206.0          36.3               12.8 +/-    1.71      19.9 +/-    1.71  0.070 / 0.120
G03     54.2           9.5                 8.8 +/-    1.12      24.7 +/-    1.12  0.060 / 0.090
G06     147.1          74.6               12.8 +/-    0.73      13.3 +/-    0.73  0.080 / 0.090
G12     311.1          20.7                9.8 +/-    1.57      21.2 +/-    1.57  0.080 / 0.090
G17     43.4           43.0               10.5 +/-    1.91      14.5 +/-    1.91  0.110 / 0.200
G19     16.6           60.6               11.0 +/-    0.95      12.5 +/-    0.95  0.170 / 0.190
G24     293.8          39.4               12.3 +/-    5.38      18.0 +/-    5.38  0.040 / 0.050
G28     108.0          27.3               12.2 +/-    1.07      22.6 +/-    1.07  0.030 / 0.050