PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-12:12:30
G02     210.2          52.8                7.9 +/-    0.60       9.7 +/-    0.60  0.120 / 0.320
G06     105.2          80.8                6.6 +/-    0.64       6.7 +/-    0.64  0.100 / 0.380
G12     315.7          28.3                3.6 +/-    0.99       6.6 +/-    0.99  0.090 / 0.110
G17     52.7           35.5                2.7 +/-    0.71       4.3 +/-    0.71  0.080 / 0.120
G19     32.6           52.9                4.2 +/-    0.55       5.1 +/-    0.55  0.030 / 0.080
G24     278.1          41.9                3.9 +/-    1.73       5.6 +/-    1.73  0.030 / 0.080
G28     117.8          18.5                6.5 +/-    1.41      14.8 +/-    1.41  0.060 / 0.120