PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-10:27:50
G03     191.7          21.4                6.8 +/-    2.12      14.4 +/-    2.12  0.170 / 0.390
G07     290.7          37.7                3.7 +/-    1.68       5.5 +/-    1.68  0.190 / 0.350
G08     140.4          28.7                6.5 +/-    1.43      11.7 +/-    1.43  0.050 / 0.090
G09     321.2          65.6                2.3 +/-    1.10       2.5 +/-    1.10  0.050 / 0.080
G16     42.5           35.9                1.7 +/-    0.69       2.7 +/-    0.69  0.060 / 0.120
G23     117.3          78.3                5.8 +/-    0.69       5.9 +/-    0.69  0.060 / 0.100
G27     99.3           33.9                5.3 +/-    1.02       8.6 +/-    1.02  0.050 / 0.070
G30     273.7          12.0                5.1 +/-    4.20      13.7 +/-    4.20  0.040 / 0.080