PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-18:58:10
G02     61.3           32.0                8.4 +/-    1.38      14.1 +/-    1.38  0.100 / 0.340
G05     53.5           58.4                9.0 +/-    0.72      10.4 +/-    0.72  0.080 / 0.260
G12     183.5          29.0               10.8 +/-    2.76      19.3 +/-    2.76  0.040 / 0.120
G13     123.4          17.6               11.1 +/-    2.47      25.9 +/-    2.47  0.090 / 0.150
G15     162.0          15.5               13.8 +/-    1.90      33.9 +/-    1.90  0.040 / 0.070
G21     274.6          18.9               10.2 +/-    1.03      23.0 +/-    1.03  0.070 / 0.080
G25     232.4          49.3               10.2 +/-    1.02      13.0 +/-    1.02  0.030 / 0.030
G29     331.5          58.3                7.8 +/-    0.56       9.0 +/-    0.56  0.030 / 0.050