PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-20:57:40
G02     2.8            73.5                8.8 +/-    0.46       9.2 +/-    0.46  0.070 / 0.040
G05     160.2          40.8               13.0 +/-    0.90      18.7 +/-    0.90  0.080 / 0.030
G06     43.1           34.4                8.9 +/-    0.93      14.2 +/-    0.93  0.030 / 0.040
G12     298.6          75.3               10.8 +/-    0.41      11.1 +/-    0.41  0.040 / 0.040
G19     81.3           21.9                9.6 +/-    1.40      20.1 +/-    1.40  0.180 / 0.270
G24     223.3          17.8               10.6 +/-    2.34      24.7 +/-    2.34  0.140 / 0.300
G25     315.4          34.6                8.1 +/-    0.73      12.9 +/-    0.73  0.030 / 0.010
G29     291.5          14.3               10.1 +/-    0.76      25.4 +/-    0.76  0.030 / 0.010