PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-07:27:40
G08     283.2          22.6                5.2 +/-    1.44      10.8 +/-    1.44  0.090 / 0.170
G10     32.3           61.9                5.0 +/-    1.57       5.6 +/-    1.57  0.160 / 0.130
G14     240.2          55.8                5.3 +/-    2.02       6.2 +/-    2.02  0.080 / 0.140
G18     317.2          20.1                1.8 +/-    1.65       4.0 +/-    1.65  0.080 / 0.120
G20     78.8           46.3                5.6 +/-    1.20       7.4 +/-    1.20  0.030 / 0.030
G21     150.9          29.5                7.1 +/-    1.06      12.5 +/-    1.06  0.040 / 0.020
G24     47.6           19.6                4.1 +/-    1.67       9.1 +/-    1.67  0.100 / 0.110
G27     245.7          26.4                4.7 +/-    2.21       8.9 +/-    2.21  0.090 / 0.080
G31     181.5          15.3                5.1 +/-    0.76      12.6 +/-    0.76  0.030 / 0.030
G32     265.0          71.3                6.1 +/-    0.57       6.5 +/-    0.57  0.020 / 0.020