PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/24-23:12:40
G07     304.3          44.9                7.7 +/-    1.17      10.4 +/-    1.17  0.160 / 0.570
G08     131.6          38.7               11.6 +/-    1.19      17.2 +/-    1.19  0.140 / 0.340
G09     309.8          75.5                8.1 +/-    0.96       8.3 +/-    0.96  0.040 / 0.050
G16     41.7           28.0                5.8 +/-    1.26      10.5 +/-    1.26  0.030 / 0.050
G23     141.8          65.6               10.0 +/-    0.61      10.8 +/-    0.61  0.050 / 0.080
G27     81.0           36.8                8.7 +/-    0.47      13.3 +/-    0.47  0.050 / 0.090
G28     223.1          11.4               -1.1 +/-   21.06      -2.9 +/-   21.06  0.070 / 0.170
G30     285.5          23.5               10.6 +/-    1.05      21.5 +/-    1.05  0.070 / 0.140