PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-22:57:50
G07     8.2            67.1                9.7 +/-    0.79      10.4 +/-    0.79  0.050 / 0.050
G08     69.5           51.2               11.1 +/-    0.57      13.8 +/-    0.57  0.040 / 0.050
G09     181.6          53.7                9.9 +/-    2.57      12.0 +/-    2.57  0.040 / 0.120
G11     135.1          24.7               12.0 +/-    2.10      23.7 +/-    2.10  0.050 / 0.090
G23     159.3          20.8               12.5 +/-    0.73      27.0 +/-    0.73  0.070 / 0.110
G27     41.3           18.5                8.5 +/-    1.14      19.4 +/-    1.14  0.080 / 0.130
G28     256.3          44.3                8.3 +/-    1.82      11.3 +/-    1.82  0.060 / 0.160
G30     321.9          52.1               11.1 +/-    1.46      13.6 +/-    1.46  0.070 / 0.160