PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-21:58:00
G03     201.3          45.8               12.0 +/-    0.66      16.0 +/-    0.66  0.070 / 0.110
G07     266.3          22.2               10.4 +/-    2.18      21.7 +/-    2.18  0.080 / 0.120
G09     315.2          36.9               10.1 +/-    0.96      15.6 +/-    0.96  0.030 / 0.030
G16     70.0           62.9                9.6 +/-    0.34      10.7 +/-    0.34  0.030 / 0.030
G22     184.6          30.0               11.9 +/-    1.44      20.8 +/-    1.44  0.070 / 0.130
G23     343.7          70.3                9.5 +/-    0.74      10.0 +/-    0.74  0.090 / 0.190
G26     46.5           34.4                8.5 +/-    1.26      13.7 +/-    1.26  0.050 / 0.070
G27     124.3          18.8               11.9 +/-    1.44      27.1 +/-    1.44  0.050 / 0.070