PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-21:27:40
G03     188.1          16.8               10.6 +/-    1.86      25.2 +/-    1.86  0.080 / 0.120
G07     293.0          38.8                7.7 +/-    1.83      11.4 +/-    1.83  0.060 / 0.100
G08     141.4          29.8               12.3 +/-    1.47      21.6 +/-    1.47  0.100 / 0.090
G09     319.4          64.6                8.4 +/-    0.41       9.2 +/-    0.41  0.070 / 0.080
G16     42.2           37.0                7.4 +/-    0.62      11.4 +/-    0.62  0.060 / 0.070
G23     124.9          75.5                8.3 +/-    0.72       8.5 +/-    0.72  0.070 / 0.090
G27     94.8           34.8                9.4 +/-    1.43      15.0 +/-    1.43  0.030 / 0.020