PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-16:57:50
G03     241.5          70.8               10.8 +/-    0.83      11.3 +/-    0.83  0.130 / 0.250
G09     299.8          13.3               11.3 +/-    1.95      29.2 +/-    1.95  0.120 / 0.260
G14     94.5           20.0               10.4 +/-    1.93      22.8 +/-    1.93  0.030 / 0.050
G16     135.0          54.9               13.6 +/-    0.48      16.2 +/-    0.48  0.040 / 0.050
G22     194.8          59.3               11.3 +/-    0.81      13.0 +/-    0.81  0.030 / 0.050
G23     317.0          47.2               10.6 +/-    0.98      13.9 +/-    0.98  0.040 / 0.040
G31     49.9           22.6                7.2 +/-    2.69      14.9 +/-    2.69  0.080 / 0.200