PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-20:27:20
G02     52.7           38.5                7.3 +/-    1.56      10.9 +/-    1.56  0.310 / 0.700
G05     71.4           66.5                7.6 +/-    0.73       8.2 +/-    0.73  0.270 / 0.640
G12     186.6          41.8                9.6 +/-    0.87      13.6 +/-    0.87  0.150 / 0.600
G13     132.3          10.2               -3.0 +/-   24.00      -8.4 +/-   24.00  0.170 / 0.540
G21     265.6          12.1                7.5 +/-   16.98      20.1 +/-   16.98  0.050 / 0.050
G25     250.5          56.2                7.6 +/-    1.95       8.9 +/-    1.95  0.050 / 0.060
G29     324.3          48.3                7.7 +/-    0.51       9.9 +/-    0.51  0.050 / 0.080