PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-13:12:40
G01     73.0           32.9                6.2 +/-    1.21      10.2 +/-    1.21  0.030 / 0.040
G07     136.1          30.3                7.4 +/-    0.96      12.8 +/-    0.96  0.030 / 0.040
G11     54.3           29.8                5.2 +/-    0.65       9.2 +/-    0.65  0.040 / 0.100
G13     279.7          36.9                6.1 +/-    0.86       9.4 +/-    0.86  0.050 / 0.120
G15     306.2          14.0                3.0 +/-    2.55       7.7 +/-    2.55  0.110 / 0.220
G17     231.1          70.0                6.2 +/-    0.60       6.6 +/-    0.60  0.150 / 0.280
G19     222.8          42.1                7.3 +/-    1.31      10.3 +/-    1.31  0.070 / 0.090
G28     16.4           59.5                5.6 +/-    0.65       6.4 +/-    0.65  0.080 / 0.110
G30     131.9          65.7                6.5 +/-    0.56       7.0 +/-    0.56  0.030 / 0.040