PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-17:43:10
G01     128.5          10.6               -0.8 +/-   40.47      -2.3 +/-   40.47  0.040 / 0.050
G07     45.7           69.9               11.1 +/-    0.70      11.7 +/-    0.70  0.040 / 0.040
G08     53.4           43.2                9.2 +/-    1.57      12.7 +/-    1.57  0.030 / 0.030
G09     178.6          38.2               12.0 +/-    1.11      17.9 +/-    1.11  0.030 / 0.040
G11     121.4          34.0               12.8 +/-    0.66      20.7 +/-    0.66  0.030 / 0.030
G18     105.9          15.7               11.6 +/-    1.82      28.3 +/-    1.82  0.030 / 0.030
G28     273.8          52.1               10.9 +/-    2.66      13.5 +/-    2.66  0.080 / 0.080
G30     332.2          59.8                9.6 +/-    0.44      10.9 +/-    0.44  0.110 / 0.080