PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-11:57:30
G07     321.9          53.8                3.9 +/-    0.69       4.7 +/-    0.69  0.020 / 0.020
G08     113.5          46.9                4.4 +/-    0.82       5.8 +/-    0.82  0.030 / 0.020
G09     221.1          83.1                3.9 +/-    0.56       3.9 +/-    0.56  0.040 / 0.040
G16     43.4           17.5                3.2 +/-    3.94       7.5 +/-    3.94  0.040 / 0.040
G23     150.7          55.4                5.2 +/-    0.91       6.2 +/-    0.91  0.190 / 0.150
G27     66.3           35.3                2.8 +/-    1.03       4.4 +/-    1.03  0.170 / 0.210
G28     229.5          20.5                2.5 +/-    2.76       5.5 +/-    2.76  0.040 / 0.040
G30     291.7          25.7                5.3 +/-    1.37      10.2 +/-    1.37  0.040 / 0.040