PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:42:50
G01     89.7           31.5               12.3 +/-    1.02      20.9 +/-    1.02  0.040 / 0.070
G07     126.3          39.2               13.5 +/-    0.84      20.0 +/-    0.84  0.040 / 0.080
G11     67.1           39.5               11.4 +/-    1.63      16.7 +/-    1.63  0.060 / 0.050
G13     294.0          36.8                8.0 +/-    2.65      12.3 +/-    2.65  0.060 / 0.050
G15     314.8          10.4               -9.3 +/-    9.36     -25.6 +/-    9.36  0.030 / 0.030
G17     213.4          54.2               14.3 +/-    0.79      17.2 +/-    0.79  0.030 / 0.030
G18     61.7           22.9                9.9 +/-    1.38      20.4 +/-    1.38  0.060 / 0.120
G19     213.9          27.3               13.9 +/-    1.40      25.7 +/-    1.40  0.060 / 0.130
G28     339.2          61.6               10.1 +/-    0.50      11.3 +/-    0.50  0.100 / 0.180
G30     107.4          74.5               13.0 +/-    0.98      13.4 +/-    0.98  0.090 / 0.170