PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-15:42:30
G01     38.0           11.5                7.8 +/-    2.92      20.9 +/-    2.92  0.090 / 0.170
G02     200.0          11.4                3.5 +/-   14.06       9.4 +/-   14.06  0.090 / 0.160
G13     232.1          18.9                8.6 +/-    3.39      19.4 +/-    3.39  0.030 / 0.020
G17     4.4            68.5                8.6 +/-    0.98       9.2 +/-    0.98  0.030 / 0.030
G19     297.5          71.9                8.2 +/-    0.51       8.6 +/-    0.51  0.040 / 0.060
G24     314.5          22.9                8.0 +/-    1.75      16.3 +/-    1.75  0.050 / 0.070
G28     72.6           48.8                8.6 +/-    1.60      11.0 +/-    1.60  0.040 / 0.040
G30     155.5          21.3                9.8 +/-    0.63      21.0 +/-    0.63  0.040 / 0.030