PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/24-20:28:00
G02     54.2           37.3                8.6 +/-    1.39      13.1 +/-    1.39  0.060 / 0.060
G05     67.4           65.3                9.2 +/-    0.40      10.0 +/-    0.40  0.050 / 0.050
G12     186.2          39.8               11.7 +/-    1.02      17.0 +/-    1.02  0.180 / 0.330
G13     131.0          11.3               12.7 +/-    2.29      34.4 +/-    2.29  0.210 / 0.360
G21     267.0          13.2                9.9 +/-    8.81      25.8 +/-    8.81  0.150 / 0.400
G25     247.1          55.4               11.1 +/-    1.03      13.2 +/-    1.03  0.210 / 0.480
G29     325.5          50.0                9.1 +/-    0.94      11.5 +/-    0.94  0.040 / 0.080