PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-07:57:50
G02     20.7           66.0                2.6 +/-    0.60       2.9 +/-    0.60  0.030 / 0.030
G05     155.3          48.3                7.7 +/-    1.45       9.9 +/-    1.45  0.020 / 0.030
G06     45.6           31.0                2.6 +/-    0.67       4.5 +/-    0.67  0.020 / 0.050
G12     261.2          79.0                3.8 +/-    0.76       3.8 +/-    0.76  0.030 / 0.040
G19     88.1           18.3                5.3 +/-    0.73      12.3 +/-    0.73  0.040 / 0.040
G24     219.1          13.2                4.5 +/-    2.30      11.6 +/-    2.30  0.040 / 0.040
G25     312.4          41.2                3.1 +/-    1.83       4.4 +/-    1.83  0.050 / 0.080
G29     297.5          19.3                2.8 +/-    1.10       6.2 +/-    1.10  0.050 / 0.090