PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-04:12:40
G01     125.8          12.7                4.8 +/-    3.04      12.7 +/-    3.04  0.040 / 0.060
G07     58.4           68.9                4.5 +/-    0.70       4.8 +/-    0.70  0.040 / 0.060
G08     49.4           38.1                3.7 +/-    0.59       5.6 +/-    0.59  0.040 / 0.040
G09     178.4          35.0                8.1 +/-    2.03      12.9 +/-    2.03  0.030 / 0.040
G11     117.2          35.4                6.2 +/-    0.89       9.8 +/-    0.89  0.030 / 0.050
G13     321.2          11.6               -1.0 +/-   13.46      -2.8 +/-   13.46  0.040 / 0.050
G17     199.9          17.3                5.5 +/-    1.46      13.0 +/-    1.46  0.060 / 0.120
G28     279.7          54.2                5.4 +/-    0.90       6.5 +/-    0.90  0.060 / 0.170
G30     337.5          62.9                3.6 +/-    0.72       4.0 +/-    0.72  0.110 / 0.330