PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-03:58:00
G01     103.2          27.3                4.7 +/-    1.10       8.8 +/-    1.10  0.030 / 0.030
G07     113.4          53.0                4.3 +/-    0.48       5.3 +/-    0.48  0.040 / 0.040
G08     41.4           14.8                2.0 +/-    2.00       5.1 +/-    2.00  0.060 / 0.120
G11     81.3           42.2                3.9 +/-    1.40       5.5 +/-    1.40  0.070 / 0.120
G13     306.3          31.3                3.5 +/-    1.00       6.0 +/-    1.00  0.060 / 0.130
G17     206.2          44.4                4.6 +/-    0.77       6.3 +/-    0.77  0.070 / 0.130
G18     72.7           23.5                3.8 +/-    1.21       7.7 +/-    1.21  0.050 / 0.040
G19     210.2          14.5                1.2 +/-    8.54       3.1 +/-    8.54  0.030 / 0.040
G28     320.7          60.9                2.5 +/-    0.60       2.8 +/-    0.60  0.020 / 0.020
G30     34.2           79.7                3.6 +/-    0.42       3.6 +/-    0.42  0.030 / 0.020