PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-20:57:20
G02     53.3           37.8                9.1 +/-    1.51      13.8 +/-    1.51  0.270 / 0.470
G05     69.7           65.9                8.6 +/-    0.50       9.4 +/-    0.50  0.300 / 0.420
G12     186.7          41.3               10.8 +/-    0.75      15.4 +/-    0.75  0.060 / 0.040
G13     131.9          10.5                4.1 +/-   28.59      11.4 +/-   28.59  0.050 / 0.050
G21     266.1          12.5                7.9 +/-   16.58      20.8 +/-   16.58  0.050 / 0.080
G25     249.2          55.9                5.1 +/-    2.26       6.0 +/-    2.26  0.040 / 0.060
G29     324.9          49.1                8.7 +/-    0.59      11.1 +/-    0.59  0.170 / 0.440