PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/16-18:57:50
G02     55.1           36.9                8.3 +/-    1.47      12.7 +/-    1.47  0.040 / 0.030
G05     64.7           64.7               10.0 +/-    0.49      10.9 +/-    0.49  0.030 / 0.040
G12     185.1          37.2               11.6 +/-    1.26      17.6 +/-    1.26  0.040 / 0.060
G13     129.5          12.5               13.9 +/-    4.33      36.7 +/-    4.33  0.040 / 0.050
G21     268.4          14.2               12.1 +/-    3.62      30.6 +/-    3.62  0.130 / 0.450
G25     244.1          54.4                9.3 +/-    1.45      11.2 +/-    1.45  0.140 / 0.570
G29     326.3          51.1                9.5 +/-    0.96      11.9 +/-    0.96  0.190 / 0.400