PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-17:12:50
G01     250.8          35.0                9.6 +/-    1.41      15.2 +/-    1.41  0.040 / 0.040
G03     315.7          47.7                8.1 +/-    1.11      10.5 +/-    1.11  0.040 / 0.040
G11     239.8          12.6                7.9 +/-    2.57      20.7 +/-    2.57  0.050 / 0.100
G14     59.5           41.9                7.7 +/-    1.50      10.9 +/-    1.50  0.050 / 0.080
G22     302.8          68.3                8.6 +/-    0.81       9.1 +/-    0.81  0.140 / 0.240
G23     287.7          21.0                8.1 +/-    2.33      17.5 +/-    2.33  0.070 / 0.240
G25     40.0           10.4                8.1 +/-    2.96      22.5 +/-    2.96  0.030 / 0.030
G26     135.1          38.6               12.6 +/-    1.31      18.7 +/-    1.31  0.030 / 0.040
G31     40.9           57.2                8.5 +/-    0.47       9.9 +/-    0.47  0.080 / 0.080
G32     78.2           21.9                8.1 +/-    1.06      17.0 +/-    1.06  0.090 / 0.100