PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-00:58:00
G07     25.3           69.0                7.4 +/-    0.46       7.9 +/-    0.46  0.060 / 0.060
G08     59.9           47.0                6.0 +/-    0.50       7.9 +/-    0.50  0.070 / 0.070
G09     180.3          46.7               10.2 +/-    1.82      13.4 +/-    1.82  0.130 / 0.210
G11     129.1          29.0               10.0 +/-    0.84      17.8 +/-    0.84  0.120 / 0.220
G23     160.2          15.7                9.4 +/-    2.55      23.1 +/-    2.55  0.040 / 0.050
G27     38.9           13.6                3.8 +/-    1.00       9.9 +/-    1.00  0.030 / 0.060
G28     264.2          48.3                8.8 +/-    0.77      11.4 +/-    0.77  0.020 / 0.040
G30     327.5          56.2                5.8 +/-    0.90       6.8 +/-    0.90  0.030 / 0.040