PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-16:58:10
G02     52.6           39.5                8.1 +/-    0.54      11.9 +/-    0.54  0.040 / 0.060
G05     74.5           68.7                7.4 +/-    0.93       7.9 +/-    0.93  0.050 / 0.070
G12     183.8          37.1                9.2 +/-    1.72      14.0 +/-    1.72  0.090 / 0.120
G13     132.4          11.1                3.3 +/-   25.86       9.0 +/-   25.86  0.050 / 0.080
G21     266.7          13.7                7.0 +/-    1.95      17.8 +/-    1.95  0.160 / 0.370
G25     241.8          55.5                9.5 +/-    1.00      11.3 +/-    1.00  0.110 / 0.290
G29     324.2          48.4                6.4 +/-    1.23       8.2 +/-    1.23  0.190 / 0.590