PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-05:27:50
G01     91.0           31.6                7.8 +/-    0.65      13.1 +/-    0.65  0.050 / 0.050
G07     124.9          45.6                8.9 +/-    2.13      11.9 +/-    2.13  0.040 / 0.050
G11     70.3           40.0                6.6 +/-    0.47       9.6 +/-    0.47  0.050 / 0.120
G13     296.7          34.9                6.2 +/-    0.91       9.8 +/-    0.91  0.050 / 0.110
G17     214.0          53.9               12.8 +/-    0.93      15.4 +/-    0.93  0.030 / 0.050
G19     214.2          27.6                9.8 +/-    1.96      18.1 +/-    1.96  0.040 / 0.060
G28     349.3          61.7                3.9 +/-    0.80       4.3 +/-    0.80  0.100 / 0.110
G30     103.9          74.8                7.7 +/-    0.39       8.0 +/-    0.39  0.100 / 0.090