PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-03:57:50
G01     116.1          20.0                9.0 +/-    1.29      19.8 +/-    1.29  0.040 / 0.040
G07     88.9           64.4                4.7 +/-    0.96       5.1 +/-    0.96  0.050 / 0.040
G08     43.8           28.7                4.1 +/-    2.40       7.4 +/-    2.40  0.090 / 0.120
G09     177.0          23.3                6.3 +/-    1.03      12.9 +/-    1.03  0.090 / 0.110
G11     103.5          40.6                6.0 +/-    0.74       8.6 +/-    0.74  0.210 / 0.180
G13     316.7          20.8                2.0 +/-    1.88       4.3 +/-    1.88  0.110 / 0.140
G17     202.5          28.6                5.8 +/-    1.11      10.4 +/-    1.11  0.120 / 0.110
G28     300.3          58.9                3.3 +/-    0.94       3.8 +/-    0.94  0.120 / 0.150
G30     359.4          72.4                4.4 +/-    0.66       4.6 +/-    0.66  0.140 / 0.180