PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-23:27:50
G03     248.2          69.3                8.6 +/-    1.45       9.1 +/-    1.45  0.040 / 0.040
G09     301.5          15.5                7.2 +/-    1.91      17.6 +/-    1.91  0.050 / 0.030
G14     97.5           16.1                7.7 +/-    1.69      18.6 +/-    1.69  0.030 / 0.040
G16     139.0          55.6               11.9 +/-    0.49      14.0 +/-    0.49  0.040 / 0.040
G22     198.5          59.3               10.7 +/-    0.39      12.3 +/-    0.39  0.110 / 0.270
G23     316.3          46.0                8.3 +/-    0.68      11.0 +/-    0.68  0.110 / 0.270
G26     76.8           54.3                8.9 +/-    0.71      10.7 +/-    0.71  0.130 / 0.230
G31     50.0           23.7                4.7 +/-    2.09       9.5 +/-    2.09  0.170 / 0.250