PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-23:27:40
G08     318.3          13.4                8.7 +/-    1.70      22.6 +/-    1.70  0.090 / 0.140
G10     307.3          54.5                8.9 +/-    1.45      10.7 +/-    1.45  0.080 / 0.120
G14     212.3          20.0               10.8 +/-    2.09      23.8 +/-    2.09  0.080 / 0.080
G15     45.5           22.5                8.8 +/-    2.02      18.2 +/-    2.02  0.070 / 0.090
G18     13.4           64.4                8.9 +/-    0.67       9.8 +/-    0.67  0.030 / 0.040
G20     76.7           13.0                9.7 +/-    0.96      25.2 +/-    0.96  0.040 / 0.050
G21     115.8          67.7               10.7 +/-    0.82      11.4 +/-    0.82  0.070 / 0.090
G24     91.1           29.0               12.0 +/-    1.33      21.5 +/-    1.33  0.050 / 0.090
G27     290.2          37.4               11.4 +/-    2.23      17.3 +/-    2.23  0.140 / 0.250
G32     214.7          36.6               12.8 +/-    1.98      19.8 +/-    1.98  0.190 / 0.230