PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-14:27:50
G03     246.1          70.3               11.0 +/-    0.68      11.6 +/-    0.68  0.030 / 0.040
G09     300.4          14.2                6.7 +/-    1.55      17.1 +/-    1.55  0.030 / 0.040
G14     94.4           20.8                9.4 +/-    2.07      20.2 +/-    2.07  0.100 / 0.240
G16     132.3          55.6               12.0 +/-    0.57      14.2 +/-    0.57  0.150 / 0.290
G22     190.7          56.9               12.6 +/-    0.80      14.7 +/-    0.80  0.060 / 0.050
G23     319.1          49.4                9.0 +/-    0.49      11.5 +/-    0.49  0.050 / 0.070
G26     74.7           52.4                9.4 +/-    1.28      11.6 +/-    1.28  0.040 / 0.040
G31     50.4           21.5                7.0 +/-    3.31      14.8 +/-    3.31  0.040 / 0.040