PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/20-07:27:50
G01     115.5          20.4                6.1 +/-    1.50      13.3 +/-    1.50  0.040 / 0.020
G07     92.0           63.2                5.2 +/-    0.76       5.8 +/-    0.76  0.040 / 0.030
G08     42.9           25.7                3.4 +/-    0.94       6.6 +/-    0.94  0.030 / 0.040
G09     173.2          17.8                5.3 +/-    2.03      12.2 +/-    2.03  0.030 / 0.050
G11     99.2           41.4                6.6 +/-    0.71       9.3 +/-    0.71  0.090 / 0.160
G13     315.4          22.9                1.7 +/-    2.99       3.5 +/-    2.99  0.090 / 0.170
G17     201.8          30.9                4.5 +/-    1.03       7.7 +/-    1.03  0.120 / 0.230
G18     87.8           22.0                5.3 +/-    0.93      11.2 +/-    0.93  0.120 / 0.180
G28     298.1          58.1                3.4 +/-    0.70       3.9 +/-    0.70  0.070 / 0.190
G30     350.1          70.9                5.8 +/-    0.68       6.1 +/-    0.68  0.090 / 0.200