PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-12:27:50
G01     64.3           31.6                4.6 +/-    0.83       7.8 +/-    0.83  0.110 / 0.190
G06     181.8          10.9               -9.7 +/-   32.45     -26.4 +/-   32.45  0.100 / 0.240
G11     49.7           24.8                4.0 +/-    1.50       7.8 +/-    1.50  0.070 / 0.110
G13     270.1          35.9                6.5 +/-    1.50      10.1 +/-    1.50  0.070 / 0.100
G15     299.0          15.7                1.9 +/-    2.01       4.6 +/-    2.01  0.050 / 0.060
G17     250.3          76.2                6.3 +/-    0.39       6.4 +/-    0.39  0.070 / 0.070
G19     229.2          49.1                8.2 +/-    2.42      10.5 +/-    2.42  0.030 / 0.030
G28     29.8           57.6                4.4 +/-    0.99       5.1 +/-    0.99  0.030 / 0.030
G30     140.2          57.9                5.8 +/-    0.28       6.7 +/-    0.28  0.040 / 0.050