PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/08-13:57:50
G07     45.4           69.8                9.0 +/-    0.77       9.6 +/-    0.77  0.060 / 0.040
G08     52.2           41.2                7.6 +/-    0.96      10.8 +/-    0.96  0.040 / 0.040
G09     177.3          37.2               11.0 +/-    0.56      16.8 +/-    0.56  0.050 / 0.080
G11     120.3          34.0               10.7 +/-    0.92      17.3 +/-    0.92  0.040 / 0.060
G17     199.9          12.3                8.6 +/-    2.68      22.9 +/-    2.68  0.030 / 0.030
G18     105.7          15.5                9.7 +/-    0.96      23.8 +/-    0.96  0.030 / 0.050
G28     272.7          51.6                9.5 +/-    1.16      11.8 +/-    1.16  0.060 / 0.120
G30     329.7          58.2                7.8 +/-    0.98       9.0 +/-    0.98  0.060 / 0.110