PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-19:43:10
G01     91.4           31.1               13.4 +/-    0.88      23.0 +/-    0.88  0.040 / 0.060
G07     125.1          40.5               13.1 +/-    0.99      18.9 +/-    0.99  0.030 / 0.060
G11     68.8           40.1               11.8 +/-    1.07      17.1 +/-    1.07  0.030 / 0.050
G13     295.7          36.4               14.1 +/-    3.10      21.8 +/-    3.10  0.040 / 0.030
G17     212.4          52.7               15.1 +/-    0.81      18.5 +/-    0.81  0.040 / 0.050
G18     63.1           23.2               11.0 +/-    1.30      22.4 +/-    1.30  0.060 / 0.050
G19     213.3          26.0               14.8 +/-    2.75      28.2 +/-    2.75  0.090 / 0.170
G28     336.3          61.5               11.3 +/-    0.82      12.6 +/-    0.82  0.130 / 0.200
G30     102.7          75.6               12.3 +/-    0.89      12.7 +/-    0.89  0.090 / 0.140