PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-19:28:00
G02     73.3           22.9                8.2 +/-    0.93      16.9 +/-    0.93  0.080 / 0.200
G05     45.1           44.4                8.0 +/-    0.41      10.9 +/-    0.41  0.080 / 0.190
G12     180.4          14.6               10.1 +/-    4.44      25.2 +/-    4.44  0.160 / 0.340
G13     110.0          26.8               11.2 +/-    0.69      21.0 +/-    0.69  0.120 / 0.350
G15     153.6          27.9               12.1 +/-    1.19      22.2 +/-    1.19  0.050 / 0.090
G20     227.9          13.8                9.3 +/-    4.14      23.7 +/-    4.14  0.060 / 0.090
G21     286.9          27.8                8.9 +/-    1.33      16.4 +/-    1.33  0.120 / 0.200
G25     217.5          37.0               10.1 +/-    2.51      15.4 +/-    2.51  0.110 / 0.180
G26     315.0          13.4                8.9 +/-    1.90      22.9 +/-    1.90  0.030 / 0.050
G29     344.0          73.3                9.4 +/-    0.66       9.8 +/-    0.66  0.040 / 0.050