PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-12:57:50
G01     72.7           33.1                4.4 +/-    0.68       7.2 +/-    0.68  0.040 / 0.070
G07     136.4          32.3                6.2 +/-    0.92      10.4 +/-    0.92  0.020 / 0.030
G11     54.0           30.7                4.7 +/-    1.10       8.1 +/-    1.10  0.100 / 0.140
G13     276.1          37.9                6.4 +/-    0.95       9.6 +/-    0.95  0.040 / 0.110
G15     307.1          12.9                1.8 +/-    0.95       4.6 +/-    0.95  0.290 / 0.100
G17     231.0          69.4                5.7 +/-    1.29       6.1 +/-    1.29  0.050 / 0.080
G18     49.8           18.5                3.7 +/-    1.15       8.4 +/-    1.15  0.100 / 0.140
G19     222.8          36.8                6.0 +/-    1.85       9.2 +/-    1.85  0.060 / 0.090
G28     16.2           59.7                3.9 +/-    0.54       4.5 +/-    0.54  0.360 / 0.270
G30     133.6          65.3                5.9 +/-    0.91       6.4 +/-    0.91  0.070 / 0.210