PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-14:43:10
G01     63.7           31.4                6.6 +/-    0.89      11.3 +/-    0.89  0.060 / 0.160
G06     181.1          12.0                8.6 +/-   16.10      23.0 +/-   16.10  0.060 / 0.140
G07     140.4          22.5                8.2 +/-    1.70      17.0 +/-    1.70  0.040 / 0.050
G11     49.1           23.8                3.9 +/-    0.92       7.9 +/-    0.92  0.030 / 0.050
G13     269.3          35.8                9.6 +/-    1.32      15.1 +/-    1.32  0.060 / 0.190
G15     299.8          15.3                4.3 +/-    2.18      10.7 +/-    2.18  0.070 / 0.160
G17     252.3          76.6                8.7 +/-    0.61       9.0 +/-    0.61  0.020 / 0.040
G19     229.7          49.7                7.9 +/-   20.29      10.1 +/-   20.29  0.030 / 0.030
G28     30.3           57.5                5.2 +/-    1.47       6.1 +/-    1.47  0.070 / 0.090
G30     140.6          58.1                8.0 +/-    1.18       9.3 +/-    1.18  0.070 / 0.100