PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-15:42:10
G02     201.6          23.7               12.2 +/-    2.62      24.6 +/-    2.62  0.050 / 0.070
G06     167.0          59.3               11.3 +/-    0.94      12.9 +/-    0.94  0.060 / 0.090
G17     22.6           58.8                9.3 +/-    1.10      10.7 +/-    1.10  0.100 / 0.140
G19     342.2          69.7                8.8 +/-    0.46       9.4 +/-    0.46  0.080 / 0.120
G24     306.6          32.3                8.8 +/-    1.60      14.7 +/-    1.60  0.040 / 0.040
G28     89.0           42.1                9.1 +/-    0.98      12.8 +/-    0.98  0.050 / 0.050