PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-19:13:10
G01     85.3           32.3               11.8 +/-    0.75      19.7 +/-    0.75  0.040 / 0.090
G07     129.2          35.7               13.2 +/-    0.98      20.7 +/-    0.98  0.040 / 0.080
G11     63.2           37.9               10.2 +/-    0.71      15.4 +/-    0.71  0.040 / 0.070
G13     289.6          37.8               11.6 +/-    0.78      17.6 +/-    0.78  0.040 / 0.060
G15     312.1          12.0               10.1 +/-    1.93      27.0 +/-    1.93  0.090 / 0.250
G17     216.4          57.5               13.9 +/-    0.72      16.2 +/-    0.72  0.150 / 0.220
G18     58.2           22.0                8.5 +/-    1.72      17.8 +/-    1.72  0.060 / 0.130
G19     215.6          30.8               15.0 +/-    2.13      25.8 +/-    2.13  0.060 / 0.100
G28     346.1          61.6               10.4 +/-    0.55      11.6 +/-    0.55  0.070 / 0.200
G30     117.2          71.2               13.4 +/-    0.60      14.0 +/-    0.60  0.090 / 0.240