PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-17:27:40
G02     64.3           29.4                9.2 +/-    1.67      16.2 +/-    1.67  0.250 / 0.360
G05     50.9           56.5                9.3 +/-    1.16      10.9 +/-    1.16  0.160 / 0.470
G12     182.3          25.0               10.4 +/-    2.78      20.2 +/-    2.78  0.090 / 0.230
G13     120.7          19.7               12.1 +/-    2.01      26.7 +/-    2.01  0.100 / 0.260
G15     160.3          18.1               12.2 +/-    1.33      28.1 +/-    1.33  0.090 / 0.160
G21     277.3          20.9                7.1 +/-    1.99      15.4 +/-    1.99  0.100 / 0.170
G25     228.4          46.9                8.6 +/-    3.03      11.3 +/-    3.03  0.080 / 0.130
G29     333.4          61.0                7.6 +/-    0.76       8.5 +/-    0.76  0.070 / 0.110