PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-21:27:50
G01     273.6          41.1               10.9 +/-    1.17      15.6 +/-    1.17  0.040 / 0.070
G03     315.4          27.6                8.5 +/-    1.18      15.8 +/-    1.18  0.050 / 0.070
G10     128.5          19.2               12.6 +/-    0.88      28.2 +/-    0.88  0.050 / 0.090
G11     252.9          21.6               12.1 +/-    2.58      25.6 +/-    2.58  0.060 / 0.090
G14     41.3           51.1                7.6 +/-    0.74       9.5 +/-    0.74  0.030 / 0.030
G22     314.3          49.2                7.8 +/-    1.07      10.0 +/-    1.07  0.030 / 0.030
G25     53.9           17.2                7.7 +/-    1.10      18.0 +/-    1.10  0.090 / 0.150
G26     151.0          22.5               13.2 +/-    1.01      27.3 +/-    1.01  0.080 / 0.150
G31     63.9           77.8               10.4 +/-    0.61      10.6 +/-    0.61  0.040 / 0.070
G32     61.9           34.6                7.8 +/-    0.70      12.5 +/-    0.70  0.050 / 0.070