PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-19:27:50
G01     237.9          27.1               11.1 +/-    1.61      20.7 +/-    1.61  0.030 / 0.030
G03     308.8          58.4                9.2 +/-    0.88      10.6 +/-    0.88  0.040 / 0.030
G14     73.0           33.6                7.9 +/-    1.22      12.9 +/-    1.22  0.060 / 0.110
G16     157.9          30.1               12.4 +/-    2.38      21.7 +/-    2.38  0.060 / 0.120
G22     268.8          75.6               11.0 +/-    0.66      11.3 +/-    0.66  0.050 / 0.040
G23     296.9          28.1                7.9 +/-    1.38      14.4 +/-    1.38  0.030 / 0.060
G26     121.5          48.0               11.3 +/-    0.42      14.7 +/-    0.42  0.090 / 0.180
G31     41.0           45.3                7.0 +/-    0.87       9.4 +/-    0.87  0.090 / 0.210
G32     88.4           14.5                8.6 +/-    4.54      21.6 +/-    4.54  0.130 / 0.130