PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-07:57:40
G01     95.9           30.2                5.4 +/-    0.85       9.4 +/-    0.85  0.030 / 0.030
G07     120.9          48.5                6.8 +/-    0.99       8.8 +/-    0.99  0.030 / 0.030
G11     72.8           40.8                5.6 +/-    0.80       8.0 +/-    0.80  0.050 / 0.050
G13     299.7          34.6                6.7 +/-    1.52      10.7 +/-    1.52  0.050 / 0.040
G17     210.3          51.0                7.6 +/-    1.49       9.5 +/-    1.49  0.050 / 0.130
G18     66.8           23.7                5.2 +/-    1.39      10.4 +/-    1.39  0.070 / 0.120
G19     212.8          19.3                2.9 +/-    1.63       6.5 +/-    1.63  0.070 / 0.200
G28     336.2          61.8                2.7 +/-    0.67       3.1 +/-    0.67  0.070 / 0.180
G30     74.9           80.2                6.0 +/-    0.83       6.1 +/-    0.83  0.060 / 0.110