PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-08:13:00
G02     24.2           63.5                1.9 +/-    0.80       2.1 +/-    0.80  0.030 / 0.040
G05     152.9          51.3                5.8 +/-    0.73       7.2 +/-    0.73  0.030 / 0.040
G06     46.9           28.5                1.9 +/-    1.49       3.4 +/-    1.49  0.030 / 0.030
G12     243.1          78.5                3.8 +/-    0.43       3.9 +/-    0.43  0.030 / 0.030
G19     90.7           16.5                5.0 +/-    1.11      12.0 +/-    1.11  0.400 / 0.290
G20     199.6          11.2               -3.4 +/-   12.23      -9.2 +/-   12.23  0.290 / 0.580
G24     217.1          11.2                1.5 +/-    8.11       4.2 +/-    8.11  0.130 / 0.330
G25     310.4          43.8                3.0 +/-    0.64       4.1 +/-    0.64  0.160 / 0.460
G29     299.8          21.4                2.6 +/-    1.92       5.5 +/-    1.92  0.050 / 0.050