PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-07:57:40
G07     340.7          60.7                4.7 +/-    0.60       5.3 +/-    0.60  0.040 / 0.030
G08     88.5           51.8                6.7 +/-    1.37       8.3 +/-    1.37  0.030 / 0.030
G09     176.8          64.4                6.9 +/-    1.24       7.6 +/-    1.24  0.080 / 0.070
G11     141.9          16.5                6.3 +/-    1.74      15.1 +/-    1.74  0.070 / 0.090
G23     157.3          38.3                7.2 +/-    0.89      10.7 +/-    0.89  0.080 / 0.100
G27     52.1           30.3                4.8 +/-    1.06       8.3 +/-    1.06  0.060 / 0.120
G28     240.4          32.0                5.0 +/-    1.76       8.5 +/-    1.76  0.050 / 0.070
G30     304.4          36.6                4.6 +/-    1.44       7.0 +/-    1.44  0.050 / 0.080