PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-13:28:10
G07     332.7          57.9                5.9 +/-    0.63       6.9 +/-    0.63  0.040 / 0.050
G08     99.4           52.0                7.7 +/-    0.52       9.5 +/-    0.52  0.030 / 0.040
G09     187.9          72.6                8.0 +/-    0.71       8.4 +/-    0.71  0.090 / 0.110
G11     145.6          13.4                8.2 +/-    1.81      21.3 +/-    1.81  0.080 / 0.110
G23     154.9          39.5                8.6 +/-    0.80      12.6 +/-    0.80  0.060 / 0.070
G27     55.0           31.7                6.6 +/-    0.64      11.2 +/-    0.64  0.070 / 0.070
G28     237.4          29.6                7.8 +/-    2.63      13.8 +/-    2.63  0.080 / 0.180
G30     301.9          34.8                6.4 +/-    1.38      10.3 +/-    1.38  0.060 / 0.140