PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-14:27:50
G01     42.0           17.3                7.1 +/-    1.27      16.7 +/-    1.27  0.080 / 0.230
G06     175.7          37.2                9.8 +/-    2.15      15.0 +/-    2.15  0.080 / 0.190
G13     241.2          23.2                7.0 +/-    3.32      14.3 +/-    3.32  0.080 / 0.080
G15     274.4          12.9                5.9 +/-    1.30      15.5 +/-    1.30  0.100 / 0.090
G17     5.3            70.0                7.6 +/-    0.41       8.0 +/-    0.41  0.290 / 0.300
G19     277.5          70.0                7.8 +/-    0.43       8.3 +/-    0.43  0.310 / 0.280
G24     317.7          16.4                4.3 +/-    3.27      10.2 +/-    3.27  0.210 / 0.300
G28     70.0           47.3                7.7 +/-    0.86      10.1 +/-    0.86  0.120 / 0.190
G30     154.4          30.8                8.4 +/-    1.16      14.5 +/-    1.16  0.030 / 0.020