PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-16:12:40
G03     219.0          64.8                9.9 +/-    0.96      10.8 +/-    0.96  0.090 / 0.360
G07     251.7          14.1                8.0 +/-    2.71      20.2 +/-    2.71  0.080 / 0.250
G09     305.3          20.5                6.3 +/-    1.34      13.7 +/-    1.34  0.170 / 0.340
G14     103.0          10.9                8.7 +/-    2.05      23.7 +/-    2.05  0.220 / 0.350
G16     129.8          60.5                9.9 +/-    0.55      11.2 +/-    0.55  0.050 / 0.040
G22     188.7          48.2               10.0 +/-    0.56      12.9 +/-    0.56  0.040 / 0.030
G23     321.8          51.7                8.7 +/-    0.58      10.8 +/-    0.58  0.120 / 0.230
G26     67.6           52.5                7.5 +/-    0.57       9.2 +/-    0.57  0.130 / 0.220
G31     54.0           18.1                6.7 +/-    1.81      15.6 +/-    1.81  0.040 / 0.060