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                9.1 +/-    0.96      14.5 +/-    0.96  0.030 / 0.040
G03     315.7          47.7                6.2 +/-    1.57       8.1 +/-    1.57  0.020 / 0.040
G11     239.8          12.6               10.1 +/-    3.29      26.7 +/-    3.29  0.030 / 0.040
G14     59.5           41.9                8.4 +/-    0.72      11.8 +/-    0.72  0.030 / 0.050
G22     302.8          68.3                7.9 +/-    0.89       8.5 +/-    0.89  0.050 / 0.110
G23     287.7          21.0                8.5 +/-    2.57      18.3 +/-    2.57  0.040 / 0.100
G25     40.0           10.4                8.4 +/-    1.82      23.2 +/-    1.82  0.190 / 0.290
G26     135.1          38.6               12.7 +/-    0.59      18.8 +/-    0.59  0.130 / 0.360
G31     40.9           57.2                8.5 +/-    0.41      10.0 +/-    0.41  0.070 / 0.100
G32     78.2           21.9                7.9 +/-    1.06      16.7 +/-    1.06  0.060 / 0.100