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                8.9 +/-    2.34      13.4 +/-    2.34  0.070 / 0.110
G03     310.7          15.9                7.7 +/-    2.70      18.6 +/-    2.70  0.080 / 0.100
G10     115.8          32.8                8.3 +/-    0.94      13.7 +/-    0.94  0.070 / 0.170
G11     273.3          26.6                6.0 +/-    2.06      11.3 +/-    2.06  0.060 / 0.150
G14     13.9           62.3                6.1 +/-    0.80       6.7 +/-    0.80  0.020 / 0.040
G22     313.1          35.6                9.3 +/-    1.17      14.5 +/-    1.17  0.020 / 0.030
G25     72.4           18.8                8.7 +/-    1.42      19.8 +/-    1.42  0.040 / 0.060
G26     158.9          9.9               -20.7 +/-   12.77     -57.8 +/-   12.77  0.040 / 0.070
G31     146.1          75.9                6.8 +/-    1.00       6.9 +/-    1.00  0.150 / 0.360
G32     47.1           44.7                6.1 +/-    2.66       8.2 +/-    2.66  0.130 / 0.330