PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/27-13:27:30
G02     201.8          20.6                5.0 +/-    2.30      10.8 +/-    2.30  0.110 / 0.170
G06     167.3          57.7                6.6 +/-    0.45       7.6 +/-    0.45  0.110 / 0.170
G13     223.8          11.4                4.6 +/-    1.42      12.6 +/-    1.42  0.050 / 0.040
G17     20.8           59.9                5.0 +/-    1.02       5.7 +/-    1.02  0.040 / 0.050
G19     337.8          70.4                4.6 +/-    0.60       4.9 +/-    0.60  0.050 / 0.030
G24     308.2          30.7                4.3 +/-    1.56       7.4 +/-    1.56  0.050 / 0.030
G28     86.4           43.6                6.6 +/-    1.06       9.1 +/-    1.06  0.040 / 0.030
G30     157.6          12.4                5.7 +/-    1.46      15.1 +/-    1.46  0.040 / 0.040