PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-03:27:50
G01     113.0          21.9                6.0 +/-    1.48      12.7 +/-    1.48  0.030 / 0.040
G07     98.4           60.4                5.4 +/-    1.21       6.1 +/-    1.21  0.040 / 0.030
G08     42.3           23.2                3.1 +/-    1.95       6.3 +/-    1.95  0.050 / 0.050
G09     174.6          17.9                5.8 +/-    1.18      13.3 +/-    1.18  0.040 / 0.060
G11     95.2           42.0               -3.3 +/-    0.66      -4.6 +/-    0.66  0.120 / 0.190
G13     313.8          24.9                2.8 +/-    1.22       5.5 +/-    1.22  0.100 / 0.200
G17     202.3          34.0                7.0 +/-    0.77      11.3 +/-    0.77  0.030 / 0.030
G28     301.4          58.5                4.3 +/-    1.41       5.0 +/-    1.41  0.030 / 0.030
G30     356.6          73.3                4.9 +/-    1.14       5.1 +/-    1.14  0.150 / 0.180