PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-07:27:40
G02     203.4          39.5                6.3 +/-    0.56       9.2 +/-    0.56  0.040 / 0.080
G06     168.1          68.9                6.9 +/-    0.38       7.4 +/-    0.38  0.040 / 0.060
G12     308.9          16.2                3.5 +/-    3.07       8.5 +/-    3.07  0.140 / 0.170
G17     39.4           46.6                4.5 +/-    1.31       5.9 +/-    1.31  0.370 / 0.280
G19     10.1           62.8                3.8 +/-    0.55       4.3 +/-    0.55  0.040 / 0.050
G24     295.9          38.7                3.9 +/-    1.56       5.8 +/-    1.56  0.060 / 0.040
G28     105.9          28.5                7.1 +/-    1.63      12.8 +/-    1.63  0.030 / 0.020