PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-12:27:50
G01     228.4          19.0                7.9 +/-    1.59      17.9 +/-    1.59  0.080 / 0.170
G03     291.0          67.3                3.4 +/-    0.80       3.7 +/-    0.80  0.080 / 0.150
G14     82.0           29.9                4.8 +/-    0.68       8.5 +/-    0.68  0.030 / 0.040
G16     146.8          43.4                8.1 +/-    0.86      11.1 +/-    0.86  0.030 / 0.040
G22     209.4          71.2                6.7 +/-    0.76       7.1 +/-    0.76  0.040 / 0.040
G23     307.9          39.3                4.1 +/-    0.80       6.1 +/-    0.80  0.030 / 0.060
G26     98.8           53.2                5.9 +/-    0.64       7.2 +/-    0.64  0.170 / 0.300
G31     44.9           32.4                4.1 +/-    1.27       6.8 +/-    1.27  0.120 / 0.380