PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-20:57:50
G03     209.0          56.0               10.1 +/-    1.02      11.9 +/-    1.02  0.120 / 0.290
G07     257.8          15.7               11.3 +/-    1.66      27.7 +/-    1.66  0.110 / 0.230
G09     310.6          28.0                7.1 +/-    0.96      12.9 +/-    0.96  0.060 / 0.070
G16     96.2           65.4               -1.9 +/-    0.25      -2.1 +/-    0.25  0.050 / 0.080
G22     187.6          40.4               10.4 +/-    2.28      15.0 +/-    2.28  0.080 / 0.230
G23     331.9          61.3                9.2 +/-    0.91      10.4 +/-    0.91  0.070 / 0.260
G26     52.8           42.7                7.8 +/-    0.37      10.9 +/-    0.37  0.040 / 0.050
G27     132.4          11.7               12.0 +/-    2.14      32.3 +/-    2.14  0.030 / 0.050