PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-17:27:50
G01     113.3          21.2               14.3 +/-    1.21      30.5 +/-    1.21  0.040 / 0.060
G07     100.2          57.4               14.6 +/-    0.48      17.0 +/-    0.48  0.040 / 0.070
G08     43.0           26.5               11.8 +/-    0.46      22.2 +/-    0.46  0.040 / 0.060
G09     176.8          21.7               12.6 +/-    2.30      26.7 +/-    2.30  0.040 / 0.050
G11     97.5           42.3               14.4 +/-    0.55      20.1 +/-    0.55  0.090 / 0.170
G13     314.2          24.7               11.7 +/-    1.61      23.1 +/-    1.61  0.090 / 0.170
G17     202.6          30.2               14.1 +/-    1.83      24.7 +/-    1.83  0.070 / 0.090
G18     86.2           22.5               11.7 +/-    1.49      24.3 +/-    1.49  0.070 / 0.090
G28     295.4          56.6               12.4 +/-    0.98      14.5 +/-    0.98  0.060 / 0.210
G30     7.3            74.8               14.8 +/-    0.60      15.2 +/-    0.60  0.070 / 0.240