PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/08-12:57:40
G07     307.0          48.4                5.2 +/-    1.92       6.7 +/-    1.92  0.110 / 0.060
G08     133.3          36.9                8.5 +/-    1.14      13.0 +/-    1.14  0.110 / 0.070
G09     313.5          73.3                4.9 +/-    0.51       5.1 +/-    0.51  0.060 / 0.060
G16     42.0           29.1                4.8 +/-    1.31       8.6 +/-    1.31  0.090 / 0.070
G23     139.4          65.8                8.1 +/-    0.41       8.8 +/-    0.41  0.030 / 0.040
G27     86.5           37.1                7.2 +/-    0.92      11.1 +/-    0.92  0.030 / 0.040
G30     284.1          22.7                6.3 +/-    0.98      13.0 +/-    0.98  0.040 / 0.030