PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/14-03:12:50
G01     126.5          11.8              -10.4 +/-   31.89     -28.0 +/-   31.89  0.040 / 0.030
G07     60.5           68.3                5.3 +/-    0.49       5.6 +/-    0.49  0.050 / 0.040
G08     48.7           36.6                3.5 +/-    1.34       5.4 +/-    1.34  0.090 / 0.230
G09     176.3          33.6                6.7 +/-    0.74      11.0 +/-    0.74  0.140 / 0.380
G11     115.5          36.1                5.8 +/-    1.40       9.0 +/-    1.40  0.140 / 0.240
G13     320.8          12.5               -4.9 +/-   12.49     -12.8 +/-   12.49  0.120 / 0.210
G17     198.8          17.8                5.1 +/-    1.16      11.9 +/-    1.16  0.120 / 0.120
G18     99.8           16.8                6.0 +/-    1.85      14.2 +/-    1.85  0.130 / 0.110
G28     274.5          51.6                7.0 +/-    2.63       8.7 +/-    2.63  0.040 / 0.030
G30     331.5          59.9                3.8 +/-    0.66       4.3 +/-    0.66  0.040 / 0.040