PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-22:28:00
G03     240.1          68.5                8.1 +/-    0.92       8.6 +/-    0.92  0.140 / 0.360
G09     303.9          19.9                6.9 +/-    1.01      15.3 +/-    1.01  0.150 / 0.410
G14     99.6           14.0                9.0 +/-    2.03      23.1 +/-    2.03  0.050 / 0.040
G16     129.0          58.3                9.9 +/-    0.62      11.5 +/-    0.62  0.060 / 0.040
G22     196.4          55.9                8.2 +/-    0.54       9.7 +/-    0.54  0.030 / 0.040
G23     317.4          46.9                8.6 +/-    1.02      11.3 +/-    1.02  0.030 / 0.040
G26     72.8           53.5                7.2 +/-    0.51       8.7 +/-    0.51  0.060 / 0.050
G31     51.0           23.2                6.2 +/-    3.04      12.5 +/-    3.04  0.060 / 0.050