PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-19:28:00
G02     253.3          77.8                8.5 +/-    0.39       8.7 +/-    0.39  0.150 / 0.380
G05     170.0          19.3               12.4 +/-    1.62      27.7 +/-    1.62  0.110 / 0.320
G06     39.7           55.2                8.0 +/-    0.63       9.6 +/-    0.63  0.030 / 0.030
G12     320.8          53.4                6.6 +/-    1.01       7.9 +/-    1.01  0.030 / 0.030
G17     72.3           21.9                7.8 +/-    1.18      16.5 +/-    1.18  0.070 / 0.120
G19     60.9           35.3                7.2 +/-    1.52      11.4 +/-    1.52  0.080 / 0.110
G24     241.8          32.6               20.6 +/-    1.47      34.2 +/-    1.47  0.100 / 0.140
G25     316.8          14.5                5.3 +/-    1.91      13.2 +/-    1.91  0.110 / 0.140