PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-12:43:10
G01     64.5           31.6                5.8 +/-    0.41       9.8 +/-    0.41  0.030 / 0.040
G06     181.7          10.9              -11.9 +/-   31.94     -32.5 +/-   31.94  0.040 / 0.040
G07     140.1          23.8                5.5 +/-    1.59      11.1 +/-    1.59  0.050 / 0.130
G11     49.7           24.8                4.9 +/-    1.55       9.6 +/-    1.55  0.090 / 0.160
G13     270.3          35.9                8.0 +/-    0.75      12.5 +/-    0.75  0.090 / 0.400
G15     299.3          15.7                2.6 +/-    2.03       6.3 +/-    2.03  0.100 / 0.360
G17     249.8          76.1                6.2 +/-    0.48       6.3 +/-    0.48  0.140 / 0.310
G19     229.0          49.0                8.2 +/-    1.41      10.4 +/-    1.41  0.190 / 0.340
G28     29.5           57.7                3.8 +/-    0.34       4.4 +/-    0.34  0.040 / 0.080
G30     140.0          58.1                4.7 +/-    0.81       5.4 +/-    0.81  0.050 / 0.080