PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-18:27:50
G01     116.8          19.6               18.9 +/-    0.69      42.0 +/-    0.69  0.040 / 0.090
G07     86.3           65.6               15.8 +/-    0.52      17.2 +/-    0.52  0.050 / 0.100
G08     44.7           31.7               12.1 +/-    0.66      20.4 +/-    0.66  0.050 / 0.060
G09     176.8          23.6               21.5 +/-    3.47      43.4 +/-    3.47  0.040 / 0.050
G11     104.7          41.0               18.0 +/-    1.15      25.7 +/-    1.15  0.120 / 0.210
G13     316.5          21.3               11.8 +/-    1.41      25.1 +/-    1.41  0.120 / 0.180
G17     203.4          24.1               22.4 +/-    1.46      44.6 +/-    1.46  0.060 / 0.080
G18     91.9           21.8               15.2 +/-    1.39      31.9 +/-    1.39  0.040 / 0.080
G28     298.1          58.5               14.9 +/-    0.65      17.2 +/-    0.65  0.030 / 0.040
G30     354.6          71.5               14.9 +/-    1.13      15.6 +/-    1.13  0.030 / 0.040