PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-07:12:30
G02     204.7          38.5                6.4 +/-    0.88       9.5 +/-    0.88  0.060 / 0.070
G06     157.4          72.1                6.1 +/-    0.41       6.3 +/-    0.41  0.060 / 0.080
G12     309.2          17.8                4.5 +/-    1.70      10.5 +/-    1.70  0.080 / 0.130
G17     41.8           43.9                3.5 +/-    2.06       4.8 +/-    2.06  0.080 / 0.130
G19     4.5            63.9                3.6 +/-    0.56       3.9 +/-    0.56  0.030 / 0.030
G24     288.6          42.6                4.2 +/-    5.57       5.9 +/-    5.57  0.030 / 0.020
G28     105.2          30.4                6.5 +/-    0.74      11.2 +/-    0.74  0.160 / 0.120