PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-19:42:50
G07     130.7          34.1               15.1 +/-    0.82      24.4 +/-    0.82  0.030 / 0.030
G11     61.1           36.7               13.2 +/-    0.96      20.3 +/-    0.96  0.040 / 0.030
G13     287.0          38.2               18.2 +/-    1.48      27.3 +/-    1.48  0.100 / 0.220
G15     310.5          12.8               11.4 +/-    1.88      30.0 +/-    1.88  0.150 / 0.240
G17     218.3          59.8               18.0 +/-    0.95      20.4 +/-    0.95  0.060 / 0.120
G18     56.2           21.3               10.2 +/-    2.69      21.8 +/-    2.69  0.050 / 0.110
G19     216.8          32.7               17.9 +/-    1.43      29.6 +/-    1.43  0.120 / 0.140
G28     350.4          61.6               13.0 +/-    0.60      14.6 +/-    0.60  0.120 / 0.110
G30     121.2          69.7               15.1 +/-    0.64      16.0 +/-    0.64  0.290 / 0.290