PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:43:00
G01     89.7           31.5               12.6 +/-    0.74      21.4 +/-    0.74  0.060 / 0.060
G07     126.3          39.2               13.4 +/-    0.70      19.7 +/-    0.70  0.050 / 0.060
G11     67.1           39.5               11.1 +/-    0.67      16.3 +/-    0.67  0.030 / 0.080
G13     294.0          36.8               11.1 +/-    1.59      17.0 +/-    1.59  0.040 / 0.070
G15     314.8          10.4               -6.1 +/-   21.32     -16.9 +/-   21.32  0.030 / 0.030
G17     213.4          54.2               14.1 +/-    1.20      17.0 +/-    1.20  0.030 / 0.030
G18     61.7           22.9                9.8 +/-    0.53      20.2 +/-    0.53  0.110 / 0.110
G19     213.9          27.3               13.6 +/-    2.36      25.3 +/-    2.36  0.100 / 0.130
G28     339.2          61.6                9.6 +/-    0.67      10.7 +/-    0.67  0.060 / 0.180
G30     107.4          74.5               13.4 +/-    0.33      13.8 +/-    0.33  0.070 / 0.170