PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/23-13:57:40
G07     55.4           67.9                7.3 +/-    0.59       7.8 +/-    0.59  0.030 / 0.040
G08     54.4           43.6                7.1 +/-    0.67       9.7 +/-    0.67  0.030 / 0.040
G09     179.2          41.0               10.8 +/-    1.33      15.4 +/-    1.33  0.070 / 0.090
G11     121.4          34.2                8.5 +/-    1.11      13.7 +/-    1.11  0.070 / 0.080
G18     105.5          15.0                8.3 +/-    1.15      20.6 +/-    1.15  0.060 / 0.110
G27     37.9           10.8                7.8 +/-    3.11      21.3 +/-    3.11  0.060 / 0.100
G28     265.7          46.4                9.1 +/-    0.90      12.0 +/-    0.90  0.230 / 0.380
G30     332.2          60.1                7.3 +/-    0.52       8.3 +/-    0.52  0.210 / 0.380