PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-09:28:00
G01     122.9          15.0                4.4 +/-    1.72      11.0 +/-    1.72  0.030 / 0.030
G07     70.0           67.9                5.1 +/-    0.37       5.4 +/-    0.37  0.030 / 0.020
G08     46.3           33.6                3.7 +/-    1.44       6.0 +/-    1.44  0.150 / 0.300
G09     174.2          26.3                4.5 +/-    2.26       8.6 +/-    2.26  0.180 / 0.240
G11     110.8          38.2                6.5 +/-    0.82       9.8 +/-    0.82  0.030 / 0.030
G13     319.4          16.2                2.0 +/-    1.48       4.9 +/-    1.48  0.030 / 0.030
G17     200.1          21.4                3.3 +/-    1.20       7.0 +/-    1.20  0.120 / 0.310
G18     97.4           19.0                4.5 +/-    1.47      10.2 +/-    1.47  0.140 / 0.320
G28     283.5          54.9                4.0 +/-    2.43       4.8 +/-    2.43  0.100 / 0.210
G30     336.9          63.7                3.9 +/-    0.73       4.3 +/-    0.73  0.100 / 0.210