PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-22:13:00
G05     50.8           12.3                7.3 +/-    1.98      19.5 +/-    1.98  0.130 / 0.390
G10     239.9          18.3               12.2 +/-    1.72      27.9 +/-    1.72  0.090 / 0.400
G13     67.4           34.4                9.0 +/-    2.25      14.4 +/-    2.25  0.040 / 0.070
G15     114.0          55.7               11.4 +/-    0.31      13.5 +/-    0.31  0.050 / 0.060
G16     309.3          14.0                7.7 +/-    2.05      19.6 +/-    2.05  0.060 / 0.120
G20     254.0          41.1               12.8 +/-    2.36      18.3 +/-    2.36  0.050 / 0.130
G21     318.7          50.1                9.8 +/-    0.60      12.3 +/-    0.60  0.040 / 0.040
G26     281.9          19.4                8.2 +/-    1.36      18.3 +/-    1.36  0.040 / 0.040
G29     157.1          65.4               10.8 +/-    0.28      11.7 +/-    0.28  0.090 / 0.160