PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-20:27:30
G01     44.2           20.3               12.0 +/-    1.28      26.3 +/-    1.28  0.160 / 0.410
G06     175.4          34.3               18.5 +/-    0.63      29.8 +/-    0.63  0.190 / 0.360
G13     242.6          25.5               16.0 +/-    1.85      30.9 +/-    1.85  0.070 / 0.170
G15     276.4          13.8               13.9 +/-    1.74      35.5 +/-    1.74  0.140 / 0.210
G17     336.3          75.3               15.8 +/-    0.87      16.3 +/-    0.87  0.040 / 0.070
G19     261.2          64.6               14.8 +/-    0.60      16.2 +/-    0.60  0.040 / 0.050
G24     317.9          15.1               10.3 +/-    1.67      25.6 +/-    1.67  0.060 / 0.100
G28     64.7           49.2               15.1 +/-    0.64      19.2 +/-    0.64  0.060 / 0.100
G30     152.8          32.2               18.6 +/-    1.18      31.1 +/-    1.18  0.050 / 0.100