PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/12-21:57:30
G07     348.6          62.8               10.0 +/-    0.44      11.1 +/-    0.44  0.090 / 0.090
G08     86.4           51.5                9.8 +/-    0.56      12.1 +/-    0.56  0.120 / 0.080
G09     185.4          68.2               10.9 +/-    0.30      11.6 +/-    0.30  0.090 / 0.160
G11     140.8          17.4                7.1 +/-    1.63      16.7 +/-    1.63  0.090 / 0.130
G23     157.8          38.1               11.2 +/-    0.97      16.8 +/-    0.97  0.040 / 0.030
G27     52.4           30.8                8.2 +/-    0.88      14.2 +/-    0.88  0.040 / 0.030
G28     240.3          30.5               12.3 +/-    1.34      21.3 +/-    1.34  0.050 / 0.070
G30     305.8          38.3                9.4 +/-    1.67      14.1 +/-    1.67  0.050 / 0.080