PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-19:27:40
G01     223.6          14.2                9.2 +/-   16.00      23.4 +/-   16.00  0.130 / 0.290
G03     269.2          70.9               10.3 +/-    0.80      10.9 +/-    0.80  0.120 / 0.290
G14     89.8           22.7                9.2 +/-    0.93      18.9 +/-    0.93  0.030 / 0.040
G16     144.6          48.6               11.7 +/-    0.61      15.0 +/-    0.61  0.030 / 0.040
G22     205.7          66.8               12.5 +/-    0.59      13.5 +/-    0.59  0.060 / 0.090
G23     311.0          41.0               10.6 +/-    0.87      15.2 +/-    0.87  0.060 / 0.100
G26     89.5           54.5                8.9 +/-    0.87      10.6 +/-    0.87  0.330 / 0.520
G31     46.8           28.6                6.5 +/-    0.85      11.7 +/-    0.85  0.310 / 0.410