PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-17:58:10
G01     320.6          13.5                5.3 +/-    2.54      13.7 +/-    2.54  0.120 / 0.280
G08     260.2          16.0                8.7 +/-    2.90      21.0 +/-    2.90  0.090 / 0.240
G10     71.4           55.4                9.1 +/-    0.46      10.7 +/-    0.46  0.040 / 0.050
G11     306.7          21.3                7.9 +/-    4.02      16.8 +/-    4.02  0.040 / 0.030
G14     281.6          69.6                8.7 +/-    0.70       9.2 +/-    0.70  0.130 / 0.290
G18     307.4          39.3                8.0 +/-    2.72      11.7 +/-    2.72  0.110 / 0.310
G20     100.6          32.8                9.2 +/-    0.82      15.2 +/-    0.82  0.070 / 0.070
G27     230.2          13.0               10.5 +/-    3.52      27.4 +/-    3.52  0.070 / 0.050
G31     180.3          32.6                9.8 +/-    1.41      16.4 +/-    1.41  0.170 / 0.380
G32     351.6          71.7                8.7 +/-    0.61       9.1 +/-    0.61  0.160 / 0.390