PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-19:12:50
G01     319.6          16.2                7.0 +/-    2.01      16.8 +/-    2.01  0.120 / 0.290
G08     259.5          14.1                8.0 +/-    1.27      20.4 +/-    1.27  0.160 / 0.240
G10     76.0           54.9                8.2 +/-    0.75       9.8 +/-    0.75  0.040 / 0.100
G11     305.5          21.7                5.6 +/-    1.82      11.9 +/-    1.82  0.060 / 0.080
G14     291.0          70.1                8.2 +/-    0.82       8.7 +/-    0.82  0.060 / 0.030
G18     100.8          28.8                9.1 +/-    0.80      16.4 +/-    0.80  0.030 / 0.030
G31     177.9          38.5               12.8 +/-    1.48      19.1 +/-    1.48  0.040 / 0.050
G32     1.1            69.2                9.4 +/-    0.67      10.0 +/-    0.67  0.040 / 0.050