PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-19:28:00
G03     223.5          65.6               10.9 +/-    1.47      11.9 +/-    1.47  0.040 / 0.040
G09     304.8          19.4               10.7 +/-    1.21      23.9 +/-    1.21  0.040 / 0.050
G14     101.8          13.7               14.8 +/-    2.59      38.1 +/-    2.59  0.120 / 0.220
G16     122.4          61.2               14.9 +/-    0.46      16.8 +/-    0.46  0.150 / 0.180
G22     191.5          51.5               13.5 +/-    1.64      16.7 +/-    1.64  0.100 / 0.390
G23     322.8          52.6               11.9 +/-    0.79      14.6 +/-    0.79  0.110 / 0.330
G26     64.3           49.8               12.7 +/-    1.40      16.0 +/-    1.40  0.030 / 0.040
G31     53.9           16.9                9.2 +/-    2.56      21.9 +/-    2.56  0.040 / 0.040