PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-13:43:00
G02     205.0          31.2                5.0 +/-    1.26       8.5 +/-    1.26  0.090 / 0.200
G03     57.6           9.4                 4.4 +/-    1.80      12.5 +/-    1.80  0.100 / 0.240
G06     155.0          70.7                5.1 +/-    0.33       5.4 +/-    0.33  0.070 / 0.150
G12     308.9          19.0                3.1 +/-    1.63       7.1 +/-    1.63  0.080 / 0.140
G17     38.0           47.4                4.3 +/-    1.70       5.6 +/-    1.70  0.040 / 0.030
G19     350.7          66.5                3.2 +/-    0.77       3.5 +/-    0.77  0.030 / 0.020
G24     294.7          40.2                1.3 +/-    8.20       1.8 +/-    8.20  0.070 / 0.070
G28     102.8          31.4                5.1 +/-    0.75       8.7 +/-    0.75  0.140 / 0.120