PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-06:12:40
G01     66.0           32.1                5.5 +/-    0.40       9.3 +/-    0.40  0.040 / 0.060
G07     139.7          26.7                8.8 +/-    1.28      16.6 +/-    1.28  0.030 / 0.060
G11     51.5           28.0                3.7 +/-    0.85       6.8 +/-    0.85  0.110 / 0.260
G13     270.8          36.4                9.6 +/-    2.10      14.9 +/-    2.10  0.080 / 0.250
G15     298.4          16.4                6.6 +/-    1.39      15.8 +/-    1.39  0.070 / 0.100
G17     243.8          73.5                9.3 +/-    0.67       9.7 +/-    0.67  0.060 / 0.100
G19     227.8          47.2               11.2 +/-    1.40      14.7 +/-    1.40  0.040 / 0.140
G28     28.1           57.9                5.1 +/-    0.60       6.0 +/-    0.60  0.040 / 0.110
G30     138.9          56.0               10.0 +/-    1.15      11.8 +/-    1.15  0.040 / 0.090