PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-05:27:50
G01     95.3           30.4                6.8 +/-    0.88      11.8 +/-    0.88  0.030 / 0.050
G07     121.1          48.8                6.8 +/-    0.72       8.7 +/-    0.72  0.040 / 0.050
G08     42.0           11.0                3.3 +/-    2.44       8.9 +/-    2.44  0.030 / 0.050
G11     75.0           41.1                6.0 +/-    0.40       8.5 +/-    0.40  0.040 / 0.050
G13     300.7          33.4                5.7 +/-    2.04       9.3 +/-    2.04  0.040 / 0.060
G17     211.4          50.1                8.0 +/-    1.46      10.1 +/-    1.46  0.030 / 0.050
G19     212.6          24.1                8.9 +/-    3.94      17.8 +/-    3.94  0.140 / 0.340
G28     341.7          61.8                4.2 +/-    0.89       4.7 +/-    0.89  0.120 / 0.370
G30     89.4           77.2                6.3 +/-    0.81       6.5 +/-    0.81  0.060 / 0.110