PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-19:58:00
G01     88.2           31.8               14.7 +/-    0.93      24.9 +/-    0.93  0.080 / 0.150
G07     127.3          38.2               15.5 +/-    1.56      23.2 +/-    1.56  0.080 / 0.130
G11     65.7           38.9               13.7 +/-    0.77      20.2 +/-    0.77  0.040 / 0.080
G13     292.5          37.2               12.7 +/-    1.38      19.3 +/-    1.38  0.030 / 0.070
G15     313.9          11.0                7.1 +/-   20.56      19.3 +/-   20.56  0.030 / 0.040
G17     214.4          55.5               15.4 +/-    1.37      18.2 +/-    1.37  0.030 / 0.050
G18     60.3           22.5               12.2 +/-    0.78      25.3 +/-    0.78  0.080 / 0.120
G19     214.5          28.4               15.5 +/-    2.47      28.0 +/-    2.47  0.080 / 0.160
G28     341.8          61.6               11.5 +/-    0.79      12.9 +/-    0.79  0.110 / 0.130
G30     110.8          73.7               14.9 +/-    0.78      15.4 +/-    0.78  0.110 / 0.140