PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-19:42:30
G02     20.7           64.1                7.8 +/-    0.99       8.6 +/-    0.99  0.040 / 0.040
G05     152.0          52.8               11.7 +/-    0.67      14.3 +/-    0.67  0.040 / 0.050
G06     48.3           23.4                6.8 +/-    2.64      13.8 +/-    2.64  0.120 / 0.290
G12     231.6          78.1                8.7 +/-    0.43       8.9 +/-    0.43  0.170 / 0.310
G19     91.9           14.3                8.8 +/-    2.75      22.2 +/-    2.75  0.020 / 0.030
G29     300.2          21.5                9.8 +/-    2.31      20.7 +/-    2.31  0.030 / 0.030