PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-16:27:50
G07     31.8           67.9                9.9 +/-    0.98      10.6 +/-    0.98  0.070 / 0.160
G08     64.4           48.4                9.7 +/-    1.28      12.4 +/-    1.28  0.070 / 0.120
G09     181.1          52.0               11.7 +/-    0.46      14.4 +/-    0.46  0.030 / 0.040
G11     129.9          27.9               11.0 +/-    1.45      20.1 +/-    1.45  0.030 / 0.030
G18     113.5          9.8                -4.9 +/-   25.56     -13.8 +/-   25.56  0.090 / 0.170
G23     159.7          19.7                9.7 +/-    1.91      21.5 +/-    1.91  0.080 / 0.150
G27     41.4           19.0                8.5 +/-    1.52      19.2 +/-    1.52  0.040 / 0.050
G28     254.5          40.6               10.5 +/-    2.70      15.2 +/-    2.70  0.060 / 0.060
G30     321.6          52.2               10.3 +/-    0.83      12.7 +/-    0.83  0.140 / 0.130