PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-23:27:40
G07     328.6          56.2                9.1 +/-    0.51      10.7 +/-    0.51  0.080 / 0.170
G08     106.2          51.2               12.7 +/-    0.41      15.8 +/-    0.41  0.130 / 0.140
G09     201.4          77.3               10.3 +/-    0.28      10.6 +/-    0.28  0.060 / 0.070
G11     149.3          10.6                3.5 +/-   23.59       9.8 +/-   23.59  0.070 / 0.070
G16     45.9           10.8                7.6 +/-    1.84      20.9 +/-    1.84  0.030 / 0.040
G23     154.2          44.0               13.5 +/-    1.08      18.4 +/-    1.08  0.040 / 0.040
G27     57.1           32.4                8.0 +/-    1.05      13.3 +/-    1.05  0.040 / 0.040
G28     235.4          28.0               10.5 +/-    1.82      19.2 +/-    1.82  0.040 / 0.040
G30     301.9          36.4               10.4 +/-    1.79      16.1 +/-    1.79  0.120 / 0.370