PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-19:27:40
G03     223.5          65.6               10.6 +/-    1.21      11.5 +/-    1.21  0.040 / 0.050
G09     304.8          19.4               11.7 +/-    1.43      26.2 +/-    1.43  0.040 / 0.060
G14     101.8          13.7               14.2 +/-    2.00      36.5 +/-    2.00  0.030 / 0.060
G16     122.4          61.2               13.1 +/-    0.89      14.7 +/-    0.89  0.040 / 0.060
G22     191.5          51.5               12.3 +/-    1.88      15.3 +/-    1.88  0.110 / 0.170
G23     322.8          52.6               13.1 +/-    1.27      16.0 +/-    1.27  0.130 / 0.230
G26     64.3           49.8               10.4 +/-    1.50      13.1 +/-    1.50  0.150 / 0.430
G31     53.9           16.9                9.9 +/-    1.66      23.5 +/-    1.66  0.150 / 0.480