PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-20:12:30
G03     245.3          70.0               12.9 +/-    0.93      13.7 +/-    0.93  0.050 / 0.050
G09     300.6          14.1               12.7 +/-    2.95      32.3 +/-    2.95  0.050 / 0.050
G14     96.1           18.0               11.8 +/-    2.22      27.3 +/-    2.22  0.110 / 0.240
G16     136.4          55.4               15.9 +/-    0.98      18.8 +/-    0.98  0.110 / 0.260
G22     197.4          59.6               14.9 +/-    0.34      16.9 +/-    0.34  0.100 / 0.150
G23     316.4          46.3               13.6 +/-    0.67      17.9 +/-    0.67  0.080 / 0.210
G26     76.3           53.5               12.2 +/-    0.88      14.8 +/-    0.88  0.040 / 0.050
G31     50.1           22.9                8.5 +/-    1.58      17.5 +/-    1.58  0.040 / 0.050