PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-20:27:50
G01     225.3          15.9               10.9 +/-    3.44      26.6 +/-    3.44  0.040 / 0.050
G03     279.2          69.6                9.1 +/-    0.81       9.7 +/-    0.81  0.030 / 0.040
G14     87.8           23.8               10.7 +/-    0.95      21.4 +/-    0.95  0.040 / 0.070
G16     147.8          45.9               14.6 +/-    1.51      19.4 +/-    1.51  0.040 / 0.080
G22     211.7          69.3               11.8 +/-    0.40      12.6 +/-    0.40  0.130 / 0.210
G23     308.8          38.7               10.4 +/-    1.26      15.5 +/-    1.26  0.120 / 0.180
G26     95.1           54.6               11.0 +/-    0.73      13.2 +/-    0.73  0.040 / 0.110
G31     45.7           31.2                8.0 +/-    0.68      13.7 +/-    0.68  0.040 / 0.090