PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-08:43:10
G08     289.3          23.3                6.7 +/-    1.05      13.6 +/-    1.05  0.110 / 0.120
G10     18.2           62.7                5.0 +/-    0.90       5.5 +/-    0.90  0.110 / 0.140
G14     233.0          50.5                8.4 +/-    1.55      10.6 +/-    1.55  0.060 / 0.120
G18     317.7          14.8                3.5 +/-    1.16       8.8 +/-    1.16  0.050 / 0.100
G20     70.7           50.0                5.8 +/-    0.54       7.4 +/-    0.54  0.030 / 0.040
G21     148.1          35.1                6.1 +/-    1.26       9.6 +/-    1.26  0.030 / 0.030
G24     52.1           22.9                4.0 +/-    0.69       8.2 +/-    0.69  0.100 / 0.120
G27     252.2          30.1                7.7 +/-    1.64      13.4 +/-    1.64  0.100 / 0.120
G32     248.5          65.8                7.1 +/-    0.58       7.7 +/-    0.58  0.050 / 0.080