PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-22:12:50
G01     50.0           25.4               12.8 +/-    1.04      24.7 +/-    1.04  0.060 / 0.120
G06     177.6          25.5               19.8 +/-    1.63      38.3 +/-    1.63  0.060 / 0.120
G07     146.5          12.7               20.4 +/-    4.12      53.7 +/-    4.12  0.080 / 0.170
G11     45.1           16.3               10.2 +/-    1.77      24.5 +/-    1.77  0.070 / 0.190
G13     250.7          30.2               16.1 +/-    0.90      28.1 +/-    0.90  0.030 / 0.060
G15     283.4          15.7               12.1 +/-    1.95      29.7 +/-    1.95  0.040 / 0.060
G17     291.5          76.8               13.5 +/-    0.63      13.8 +/-    0.63  0.100 / 0.350
G19     246.7          59.3               15.8 +/-    0.65      18.0 +/-    0.65  0.070 / 0.350
G28     53.4           52.6               13.1 +/-    0.56      16.0 +/-    0.56  0.110 / 0.340
G30     149.4          39.4               17.0 +/-    1.04      25.0 +/-    1.04  0.100 / 0.450