PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-21:42:50
G10     288.3          48.7               11.5 +/-    1.66      14.8 +/-    1.66  0.060 / 0.120
G15     49.0           39.1                9.3 +/-    0.75      13.8 +/-    0.75  0.070 / 0.100
G20     336.4          65.2               10.2 +/-    0.79      11.1 +/-    0.79  0.040 / 0.050
G21     70.6           76.9               13.2 +/-    0.42      13.5 +/-    0.42  0.040 / 0.040
G24     101.7          23.7               11.3 +/-    1.00      22.9 +/-    1.00  0.080 / 0.210
G27     307.7          30.2               10.1 +/-    1.96      17.7 +/-    1.96  0.090 / 0.150
G29     168.6          14.1               15.6 +/-    2.81      39.8 +/-    2.81  0.040 / 0.050
G32     207.9          26.6               13.2 +/-    2.49      24.8 +/-    2.49  0.050 / 0.070