PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-21:57:50
G01     39.4           14.0               10.2 +/-    3.00      25.9 +/-    3.00  0.100 / 0.190
G02     199.1          10.9                4.2 +/-   23.09      11.5 +/-   23.09  0.130 / 0.190
G06     176.4          39.4               12.9 +/-    1.55      18.9 +/-    1.55  0.040 / 0.030
G13     234.5          20.6               15.8 +/-    1.70      34.3 +/-    1.70  0.030 / 0.030
G15     267.6          11.3               12.7 +/-    2.29      34.4 +/-    2.29  0.050 / 0.070
G17     8.7            67.9               11.2 +/-    1.12      11.9 +/-    1.12  0.050 / 0.050
G19     285.3          70.4               11.4 +/-    0.65      12.0 +/-    0.65  0.190 / 0.320
G24     315.0          22.4                9.9 +/-    3.09      20.6 +/-    3.09  0.120 / 0.450
G28     70.8           48.8               12.7 +/-    0.92      16.2 +/-    0.92  0.080 / 0.140
G30     154.8          23.5               14.9 +/-    3.52      30.0 +/-    3.52  0.110 / 0.120