PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-05:43:10
G01     58.1           29.7                5.1 +/-    1.75       9.0 +/-    1.75  0.030 / 0.040
G06     182.9          13.1                3.3 +/-    3.15       8.6 +/-    3.15  0.040 / 0.050
G07     143.1          20.1                7.1 +/-    1.98      15.6 +/-    1.98  0.020 / 0.030
G11     47.8           22.7                3.2 +/-    1.78       6.7 +/-    1.78  0.030 / 0.030
G13     261.6          34.3                5.2 +/-    1.87       8.4 +/-    1.87  0.140 / 0.220
G15     291.3          16.8                3.8 +/-    2.55       9.1 +/-    2.55  0.110 / 0.210
G17     270.3          77.9                6.4 +/-    0.46       6.5 +/-    0.46  0.220 / 0.410
G19     235.5          53.8                7.0 +/-    1.67       8.5 +/-    1.67  0.210 / 0.380
G28     40.2           55.6                3.6 +/-    2.23       4.2 +/-    2.23  0.070 / 0.100
G30     144.3          48.1                8.2 +/-    0.64      10.7 +/-    0.64  0.070 / 0.080