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              -15.9 +/-   21.27     -43.9 +/-   21.27  0.170 / 0.190
G08     266.8          17.1                8.5 +/-    0.66      20.2 +/-    0.66  0.170 / 0.300
G10     64.3           58.0                8.3 +/-    0.90       9.6 +/-    0.90  0.060 / 0.060
G11     311.3          17.0                6.2 +/-    1.82      14.7 +/-    1.82  0.050 / 0.080
G14     270.8          66.7                9.9 +/-    0.50      10.7 +/-    0.50  0.320 / 0.540
G18     95.1           32.9                8.1 +/-    0.89      13.4 +/-    0.89  0.210 / 0.430
G21     153.8          10.2               11.1 +/-    1.95      30.9 +/-    1.95  0.190 / 0.210
G27     229.3          14.1               10.0 +/-    2.13      25.5 +/-    2.13  0.020 / 0.020
G31     178.2          32.4               11.4 +/-    2.15      19.1 +/-    2.15  0.020 / 0.020
G32     346.0          73.0                8.6 +/-    0.42       8.9 +/-    0.42  0.040 / 0.030