PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-10:12:50
G01     96.0           30.2                5.9 +/-    0.84      10.3 +/-    0.84  0.040 / 0.050
G07     120.7          49.1                7.3 +/-    1.17       9.4 +/-    1.17  0.040 / 0.050
G08     41.8           9.9                 3.9 +/-    2.82      11.0 +/-    2.82  0.090 / 0.120
G11     73.2           40.9                5.3 +/-    1.35       7.6 +/-    1.35  0.090 / 0.110
G13     299.8          34.5                4.0 +/-    1.94       6.5 +/-    1.94  0.030 / 0.020
G17     210.5          50.2                5.1 +/-    1.12       6.4 +/-    1.12  0.030 / 0.030
G18     67.6           24.0                4.9 +/-    2.01       9.7 +/-    2.01  0.080 / 0.120
G19     212.9          18.3                3.8 +/-    2.82       8.6 +/-    2.82  0.080 / 0.110
G28     336.9          61.8                4.4 +/-    0.61       4.9 +/-    0.61  0.070 / 0.140
G30     74.9           80.1                5.0 +/-    0.67       5.1 +/-    0.67  0.100 / 0.120