PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-21:27:50
G03     257.3          70.0                8.4 +/-    0.31       8.9 +/-    0.31  0.040 / 0.040
G09     302.3          19.7                7.1 +/-    1.00      15.6 +/-    1.00  0.040 / 0.050
G14     93.8           20.9                7.5 +/-    2.45      16.2 +/-    2.45  0.120 / 0.320
G16     130.8          54.9               11.2 +/-    0.54      13.4 +/-    0.54  0.130 / 0.310
G22     201.8          60.6                9.3 +/-    0.41      10.5 +/-    0.41  0.040 / 0.040
G23     315.2          44.9                7.6 +/-    0.69      10.2 +/-    0.69  0.040 / 0.050
G26     77.6           53.5                6.7 +/-    0.76       8.1 +/-    0.76  0.040 / 0.030
G31     50.0           23.6                6.3 +/-    2.58      12.7 +/-    2.58  0.040 / 0.030