PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-21:27:50
G01     258.7          38.2                7.6 +/-    3.10      11.3 +/-    3.10  0.070 / 0.050
G03     316.5          37.9                7.5 +/-    1.13      11.3 +/-    1.13  0.050 / 0.040
G10     134.6          10.0               11.8 +/-    3.30      32.9 +/-    3.30  0.110 / 0.160
G11     243.1          16.2                9.0 +/-    1.29      21.7 +/-    1.29  0.090 / 0.170
G14     53.8           44.5                7.6 +/-    1.12      10.4 +/-    1.12  0.030 / 0.030
G22     310.7          59.7                6.3 +/-    1.52       7.2 +/-    1.52  0.030 / 0.030
G25     44.4           13.3                6.6 +/-    2.84      17.2 +/-    2.84  0.050 / 0.090
G26     143.4          32.0               11.1 +/-    1.81      18.6 +/-    1.81  0.050 / 0.090
G31     43.3           66.8                7.3 +/-    0.52       7.8 +/-    0.52  0.050 / 0.080
G32     71.7           27.4                7.0 +/-    1.81      13.0 +/-    1.81  0.040 / 0.080