PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-18:13:00
G02     58.3           35.3                7.4 +/-    0.69      11.7 +/-    0.69  0.030 / 0.040
G05     58.3           62.6                8.7 +/-    0.84       9.7 +/-    0.84  0.030 / 0.030
G12     182.1          28.7               10.5 +/-    1.74      18.9 +/-    1.74  0.110 / 0.270
G13     126.7          16.1               12.5 +/-    1.61      30.4 +/-    1.61  0.090 / 0.240
G15     167.4          10.6                0.9 +/-   31.40       2.4 +/-   31.40  0.040 / 0.060
G21     272.5          18.0                8.6 +/-    1.90      19.8 +/-    1.90  0.040 / 0.060
G25     231.4          50.5                8.4 +/-    1.85      10.5 +/-    1.85  0.100 / 0.260
G29     328.7          55.1                7.1 +/-    0.91       8.5 +/-    0.91  0.090 / 0.240