PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-17:27:30
G07     339.5          60.5                9.8 +/-    0.48      11.1 +/-    0.48  0.030 / 0.040
G08     101.5          50.9               12.2 +/-    0.71      15.3 +/-    0.71  0.030 / 0.050
G09     199.9          77.0                9.9 +/-    0.21      10.1 +/-    0.21  0.060 / 0.080
G11     146.0          12.7               11.4 +/-    2.46      30.0 +/-    2.46  0.070 / 0.080
G16     45.8           12.1                7.2 +/-    1.73      19.0 +/-    1.73  0.030 / 0.030
G23     154.8          44.4               12.6 +/-    1.08      17.2 +/-    1.08  0.030 / 0.030
G27     59.0           34.0                8.8 +/-    2.10      14.2 +/-    2.10  0.200 / 0.200
G28     234.3          23.6               10.5 +/-    1.76      21.2 +/-    1.76  0.120 / 0.290
G30     300.9          34.9                9.1 +/-    1.39      14.4 +/-    1.39  0.070 / 0.120