PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-16:27:40
G01     296.7          38.4                7.0 +/-    2.98      10.5 +/-    2.98  0.090 / 0.080
G03     310.7          15.9                8.2 +/-    3.43      19.9 +/-    3.43  0.060 / 0.070
G10     115.8          32.8               10.4 +/-    1.94      17.2 +/-    1.94  0.020 / 0.020
G11     273.3          26.6                8.8 +/-    1.18      16.6 +/-    1.18  0.020 / 0.020
G14     13.9           62.3                7.6 +/-    0.79       8.5 +/-    0.79  0.030 / 0.040
G22     313.1          35.6                8.6 +/-    2.51      13.5 +/-    2.51  0.070 / 0.070
G25     72.4           18.8                8.5 +/-    0.92      19.2 +/-    0.92  0.080 / 0.150
G31     146.1          75.9                9.6 +/-    0.70       9.9 +/-    0.70  0.130 / 0.170
G32     47.1           44.7                6.5 +/-    1.08       8.8 +/-    1.08  0.130 / 0.250