PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:27:50
G01     97.7           29.2               12.5 +/-    1.09      22.3 +/-    1.09  0.040 / 0.050
G07     120.1          45.2               14.1 +/-    0.84      18.9 +/-    0.84  0.040 / 0.050
G08     41.6           12.7                9.4 +/-    1.70      24.8 +/-    1.70  0.040 / 0.050
G11     75.6           41.9               11.4 +/-    1.59      16.1 +/-    1.59  0.040 / 0.050
G13     301.6          34.1               10.1 +/-    1.52      16.3 +/-    1.52  0.030 / 0.030
G17     208.9          47.0               14.4 +/-    0.65      18.9 +/-    0.65  0.020 / 0.030
G18     68.9           23.9               10.3 +/-    1.60      20.6 +/-    1.60  0.090 / 0.160
G19     211.1          20.9               13.6 +/-    3.74      29.2 +/-    3.74  0.080 / 0.140
G28     325.3          60.9               10.6 +/-    0.90      11.9 +/-    0.90  0.070 / 0.130
G30     79.2           78.6               13.0 +/-    0.83      13.2 +/-    0.83  0.080 / 0.130