PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-14:27:40
G01     43.0           18.6               10.1 +/-    0.54      23.0 +/-    0.54  0.160 / 0.380
G06     176.1          35.2               14.4 +/-    0.82      22.7 +/-    0.82  0.160 / 0.380
G13     242.8          24.4               11.3 +/-    1.73      22.5 +/-    1.73  0.130 / 0.190
G15     276.1          13.4                8.6 +/-    1.01      22.2 +/-    1.01  0.100 / 0.190
G17     1.7            71.5               11.4 +/-    0.86      12.0 +/-    0.86  0.070 / 0.120
G19     271.9          69.1               10.0 +/-    0.63      10.7 +/-    0.63  0.080 / 0.150
G24     318.2          14.9                6.8 +/-    1.02      17.0 +/-    1.02  0.070 / 0.080
G28     67.5           48.2               11.1 +/-    0.61      14.3 +/-    0.61  0.060 / 0.090
G30     153.8          32.7               13.8 +/-    0.86      22.9 +/-    0.86  0.070 / 0.120