PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-13:28:10
G02     213.5          57.2                7.2 +/-    0.85       8.4 +/-    0.85  0.040 / 0.060
G06     72.1           78.7                3.8 +/-    0.48       3.9 +/-    0.48  0.040 / 0.050
G12     317.6          32.8                3.8 +/-    1.33       6.2 +/-    1.33  0.070 / 0.300
G17     56.8           32.1                3.9 +/-    0.39       6.5 +/-    0.39  0.090 / 0.270
G19     38.6           49.5                3.3 +/-    0.46       4.2 +/-    0.46  0.040 / 0.080
G24     271.5          41.8                4.6 +/-    0.61       6.5 +/-    0.61  0.040 / 0.070
G28     121.2          15.0                8.3 +/-    2.31      20.6 +/-    2.31  0.070 / 0.080