PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-07:57:50
G03     191.7          20.0                3.8 +/-    2.36       8.4 +/-    2.36  0.110 / 0.210
G07     293.3          39.3                1.7 +/-    1.70       2.5 +/-    1.70  0.120 / 0.200
G08     136.6          31.3                5.1 +/-    0.86       8.7 +/-    0.86  0.050 / 0.080
G09     321.0          69.5                3.0 +/-    0.41       3.1 +/-    0.41  0.040 / 0.080
G16     42.0           33.1                1.4 +/-    1.02       2.2 +/-    1.02  0.060 / 0.070
G23     123.1          78.3                3.8 +/-    0.41       3.9 +/-    0.41  0.050 / 0.070
G27     96.6           34.8                4.7 +/-    0.49       7.4 +/-    0.49  0.020 / 0.030
G30     275.2          12.7                4.0 +/-    1.06      10.5 +/-    1.06  0.030 / 0.040