PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-01:57:50
G03     237.5          67.1               -4.9 +/-   39.72      -5.2 +/-   39.72  0.060 / 0.060
G09     304.6          19.8               -0.9 +/-   41.25      -2.0 +/-   41.25  0.060 / 0.050
G14     101.6          12.4                3.8 +/-    8.05      10.1 +/-    8.05  0.030 / 0.040
G16     136.3          59.1                0.7 +/-   25.20       0.8 +/-   25.20  0.030 / 0.040
G22     195.1          54.5                4.8 +/-    3.63       5.8 +/-    3.63  0.090 / 0.130
G23     319.6          49.2                1.5 +/-    3.80       1.9 +/-    3.80  0.080 / 0.140
G26     70.8           53.7                1.6 +/-    2.42       1.9 +/-    2.42  0.130 / 0.580
G31     51.9           21.6               -0.1 +/-    2.39      -0.3 +/-    2.39  0.110 / 0.580