PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-17:42:50
G02     62.7           31.6                8.3 +/-    1.02      14.0 +/-    1.02  0.160 / 0.430
G05     52.7           58.8               11.4 +/-    0.66      13.1 +/-    0.66  0.430 / 0.370
G12     181.6          24.2               15.8 +/-    1.33      31.4 +/-    1.33  0.080 / 0.110
G13     122.8          19.3               13.6 +/-    1.46      30.5 +/-    1.46  0.070 / 0.110
G15     164.5          14.8               16.6 +/-    1.15      41.6 +/-    1.15  0.030 / 0.040
G21     276.5          21.1               11.2 +/-    1.86      24.0 +/-    1.86  0.030 / 0.030
G25     225.0          46.5               14.2 +/-    3.41      18.7 +/-    3.41  0.090 / 0.140
G29     332.0          60.0               10.7 +/-    0.39      12.1 +/-    0.39  0.080 / 0.110