PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/25-14:27:50
G01     52.5           26.8                6.2 +/-    2.35      11.6 +/-    2.35  0.030 / 0.050
G06     177.8          21.3                8.9 +/-    2.80      19.1 +/-    2.80  0.040 / 0.040
G07     144.2          12.9                8.9 +/-    1.70      23.2 +/-    1.70  0.100 / 0.160
G11     45.5           18.8                6.3 +/-    1.97      14.3 +/-    1.97  0.110 / 0.180
G13     253.3          33.1                9.8 +/-    1.72      16.0 +/-    1.72  0.030 / 0.030
G15     287.3          16.0                7.9 +/-    0.95      19.2 +/-    0.95  0.030 / 0.030
G17     276.5          77.1                9.8 +/-    0.50      10.0 +/-    0.50  0.070 / 0.070
G19     240.5          58.3                9.7 +/-    1.99      11.2 +/-    1.99  0.060 / 0.060
G28     36.9           57.8               10.0 +/-    1.23      11.5 +/-    1.23  0.120 / 0.200
G30     147.7          44.6                9.3 +/-    0.66      12.6 +/-    0.66  0.150 / 0.210