PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-18:12:40
G01     235.2          25.0               12.1 +/-    1.09      23.7 +/-    1.09  0.060 / 0.070
G03     304.7          62.3               12.5 +/-    1.21      13.9 +/-    1.21  0.050 / 0.080
G14     75.6           32.3               11.3 +/-    1.45      18.9 +/-    1.45  0.040 / 0.040
G16     155.4          33.6               14.0 +/-    0.91      22.8 +/-    0.91  0.030 / 0.030
G22     251.5          76.3               12.8 +/-    1.27      13.1 +/-    1.27  0.080 / 0.120
G23     299.6          30.8                9.1 +/-    1.04      15.8 +/-    1.04  0.090 / 0.140
G26     116.1          49.9               11.4 +/-    0.66      14.4 +/-    0.66  0.100 / 0.150
G31     41.8           41.8               10.3 +/-    0.61      14.6 +/-    0.61  0.100 / 0.150
G32     91.0           12.3               11.7 +/-    1.01      30.9 +/-    1.01  0.080 / 0.150