PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-22:27:50
G07     24.7           68.1               12.3 +/-    0.67      13.2 +/-    0.67  0.120 / 0.100
G08     62.3           46.8               11.0 +/-    0.83      14.4 +/-    0.83  0.120 / 0.120
G09     179.7          50.9               13.2 +/-    0.55      16.5 +/-    0.55  0.250 / 0.330
G11     129.2          27.7               11.9 +/-    1.40      21.9 +/-    1.40  0.220 / 0.420
G18     111.6          9.9                -2.2 +/-   28.42      -6.2 +/-   28.42  0.030 / 0.040
G23     160.7          22.1               11.5 +/-    1.66      24.0 +/-    1.66  0.050 / 0.040
G27     42.0           20.1                9.2 +/-    2.39      20.2 +/-    2.39  0.050 / 0.040
G28     255.4          42.0               12.6 +/-    2.41      17.8 +/-    2.41  0.050 / 0.030
G30     318.9          49.6               11.0 +/-    0.91      13.9 +/-    0.91  0.300 / 0.200