PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-20:57:40
G01     227.5          18.1               12.8 +/-    1.95      29.5 +/-    1.95  0.040 / 0.030
G03     288.5          67.8               10.6 +/-    0.66      11.4 +/-    0.66  0.040 / 0.040
G14     85.2           25.5               11.2 +/-    1.09      21.6 +/-    1.09  0.050 / 0.080
G16     150.8          42.6               15.6 +/-    1.27      21.8 +/-    1.27  0.040 / 0.080
G22     219.9          71.9               14.3 +/-    1.14      15.0 +/-    1.14  0.130 / 0.370
G23     306.3          36.3               10.8 +/-    0.83      16.8 +/-    0.83  0.130 / 0.460
G26     101.5          54.1               11.4 +/-    0.70      13.7 +/-    0.70  0.050 / 0.070
G31     44.4           34.1                8.7 +/-    1.22      14.0 +/-    1.22  0.040 / 0.090