PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-18:27:50
G01     117.2          18.5               23.6 +/-    1.57      53.9 +/-    1.57  0.050 / 0.060
G07     92.9           60.1               12.4 +/-    0.65      14.0 +/-    0.65  0.070 / 0.070
G08     44.2           29.7                9.1 +/-    1.35      16.1 +/-    1.35  0.030 / 0.040
G09     177.4          25.8               12.9 +/-    2.38      24.7 +/-    2.38  0.030 / 0.040
G11     103.2          41.1               12.2 +/-    0.47      17.5 +/-    0.47  0.040 / 0.030
G13     316.6          21.4                9.6 +/-    2.67      20.4 +/-    2.67  0.040 / 0.030
G17     201.3          26.4               14.0 +/-    1.62      26.5 +/-    1.62  0.150 / 0.310
G18     90.4           21.2               11.8 +/-    1.59      25.3 +/-    1.59  0.140 / 0.420
G28     288.5          55.1               13.1 +/-    1.91      15.6 +/-    1.91  0.090 / 0.280
G30     353.8          71.3               11.9 +/-    0.99      12.5 +/-    0.99  0.110 / 0.240