PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-22:42:50
G07     331.1          57.2                9.4 +/-    0.56      11.0 +/-    0.56  0.080 / 0.140
G08     103.9          52.0               10.7 +/-    0.61      13.2 +/-    0.61  0.090 / 0.160
G09     197.0          75.5               10.6 +/-    0.66      10.9 +/-    0.66  0.040 / 0.040
G11     148.5          11.7               10.9 +/-    2.51      29.4 +/-    2.51  0.040 / 0.030
G23     154.8          41.5                9.5 +/-    0.89      13.4 +/-    0.89  0.050 / 0.100
G27     55.3           31.5                8.0 +/-    1.74      13.6 +/-    1.74  0.050 / 0.100
G28     236.9          29.5                9.1 +/-    0.89      16.2 +/-    0.89  0.160 / 0.390
G30     303.9          38.2                8.6 +/-    1.27      12.9 +/-    1.27  0.180 / 0.380