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                6.8 +/-    0.79      11.5 +/-    0.79  0.030 / 0.050
G07     124.9          45.6                8.6 +/-    0.62      11.5 +/-    0.62  0.030 / 0.040
G11     70.3           40.0                6.4 +/-    0.93       9.4 +/-    0.93  0.100 / 0.080
G13     296.7          34.9                5.6 +/-    5.85       8.9 +/-    5.85  0.080 / 0.090
G17     214.0          53.9               11.8 +/-    1.06      14.3 +/-    1.06  0.050 / 0.080
G19     214.2          27.6               11.4 +/-    1.47      21.0 +/-    1.47  0.050 / 0.070
G28     349.3          61.7                4.9 +/-    0.43       5.4 +/-    0.43  0.040 / 0.040
G30     103.9          74.8                7.6 +/-    0.38       7.9 +/-    0.38  0.050 / 0.040