PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-16:58:10
G01     320.0          15.0                5.7 +/-    1.73      14.1 +/-    1.73  0.150 / 0.340
G08     261.8          14.8                8.4 +/-    1.15      21.0 +/-    1.15  0.180 / 0.320
G10     73.8           55.5               25.4 +/-    0.54      30.1 +/-    0.54  0.050 / 0.090
G11     307.4          20.1                8.5 +/-    2.34      18.6 +/-    2.34  0.060 / 0.080
G14     285.0          69.1                8.7 +/-    0.66       9.3 +/-    0.66  0.140 / 0.320
G18     99.9           29.3               11.1 +/-    0.81      19.7 +/-    0.81  0.160 / 0.420
G27     225.4          10.5               11.4 +/-    3.99      31.5 +/-    3.99  0.030 / 0.030
G31     177.1          38.1               13.4 +/-    1.11      20.2 +/-    1.11  0.030 / 0.030
G32     0.3            69.7                9.7 +/-    0.79      10.3 +/-    0.79  0.040 / 0.060