PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-16:58:00
G02     8.6            70.1                9.2 +/-    0.67       9.7 +/-    0.67  0.130 / 0.380
G05     158.4          46.0               11.8 +/-    0.55      15.7 +/-    0.55  0.190 / 0.420
G06     45.8           27.7                6.2 +/-    1.18      11.3 +/-    1.18  0.020 / 0.030
G12     261.9          80.0                7.9 +/-    0.51       8.0 +/-    0.51  0.030 / 0.030
G19     86.9           17.7                9.1 +/-    1.08      21.2 +/-    1.08  0.050 / 0.090
G24     219.8          13.8               11.4 +/-    1.47      29.2 +/-    1.47  0.050 / 0.100
G25     312.9          39.7                7.1 +/-    1.39      10.4 +/-    1.39  0.080 / 0.100
G29     295.3          16.7                8.1 +/-    0.92      19.3 +/-    0.92  0.060 / 0.120