PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-16:43:00
G01     321.0          10.5              -16.0 +/-   27.19     -44.1 +/-   27.19  0.210 / 0.230
G08     266.8          17.1                8.6 +/-    1.99      20.3 +/-    1.99  0.210 / 0.340
G10     64.3           58.0                6.9 +/-    0.59       8.0 +/-    0.59  0.140 / 0.420
G11     311.3          17.0                6.2 +/-    2.40      14.8 +/-    2.40  0.060 / 0.090
G14     270.8          66.7                8.5 +/-    0.61       9.2 +/-    0.61  0.050 / 0.080
G18     95.1           32.9                8.3 +/-    0.98      13.8 +/-    0.98  0.200 / 0.520
G21     153.8          10.2               14.2 +/-    5.31      39.5 +/-    5.31  0.250 / 0.350
G27     229.3          14.1               11.0 +/-    4.32      28.0 +/-    4.32  0.040 / 0.050
G31     178.2          32.4               10.1 +/-    1.93      16.8 +/-    1.93  0.040 / 0.060
G32     346.0          73.0                8.2 +/-    0.51       8.6 +/-    0.51  0.030 / 0.020