PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-18:43:10
G02     57.3           35.2                8.5 +/-    0.52      13.5 +/-    0.52  0.130 / 0.480
G05     59.8           62.7                9.2 +/-    0.42      10.3 +/-    0.42  0.120 / 0.450
G12     184.4          34.0               10.1 +/-    0.97      16.3 +/-    0.97  0.040 / 0.090
G13     127.3          14.4               11.1 +/-    3.87      27.9 +/-    3.87  0.040 / 0.110
G15     164.6          11.7               12.6 +/-    5.47      33.8 +/-    5.47  0.040 / 0.060
G21     270.7          15.9               10.5 +/-    1.85      25.5 +/-    1.85  0.050 / 0.070
G25     239.4          52.7                9.3 +/-    1.50      11.4 +/-    1.50  0.150 / 0.460
G29     328.2          53.6                6.4 +/-    1.02       7.7 +/-    1.02  0.220 / 0.400