PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-19:57:50
G10     290.3          48.8               12.2 +/-    1.67      15.6 +/-    1.67  0.060 / 0.120
G15     46.9           31.6               11.9 +/-    0.37      20.1 +/-    0.37  0.060 / 0.100
G18     350.1          66.7               11.7 +/-    0.37      12.6 +/-    0.37  0.050 / 0.060
G20     67.9           21.7               10.8 +/-    0.75      22.8 +/-    0.75  0.050 / 0.050
G21     88.1           73.9               14.3 +/-    0.49      14.8 +/-    0.49  0.090 / 0.270
G24     103.7          24.6               13.3 +/-    1.07      26.3 +/-    1.07  0.090 / 0.240
G27     303.6          33.1               12.3 +/-    2.47      20.2 +/-    2.47  0.060 / 0.130
G32     209.6          25.3               14.4 +/-    1.85      27.9 +/-    1.85  0.060 / 0.160