PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-08:13:00
G07     328.1          56.2                6.2 +/-    0.36       7.3 +/-    0.36  0.140 / 0.140
G08     102.7          50.4                8.4 +/-    0.67      10.6 +/-    0.67  0.120 / 0.120
G09     181.9          73.9                9.1 +/-    0.34       9.4 +/-    0.34  0.070 / 0.060
G11     147.2          11.3                7.5 +/-    4.66      20.2 +/-    4.66  0.060 / 0.060
G23     154.5          46.7                8.6 +/-    0.80      11.4 +/-    0.80  0.030 / 0.050
G27     60.0           34.3                5.7 +/-    1.67       9.2 +/-    1.67  0.040 / 0.050
G28     234.0          25.6                8.7 +/-    2.79      16.7 +/-    2.79  0.020 / 0.040
G30     298.0          31.2                7.1 +/-    1.54      12.1 +/-    1.54  0.030 / 0.040