PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-19:42:40
G02     228.1          69.7               10.0 +/-    0.55      10.6 +/-    0.55  0.270 / 0.380
G05     173.8          10.9               -1.2 +/-   29.48      -3.3 +/-   29.48  0.270 / 0.440
G06     43.4           65.5               10.9 +/-    0.49      11.8 +/-    0.49  0.040 / 0.040
G12     320.1          43.3               10.3 +/-    0.31      14.2 +/-    0.31  0.040 / 0.040
G17     64.3           27.4                7.8 +/-    1.79      14.4 +/-    1.79  0.080 / 0.090
G19     50.9           41.7                9.5 +/-    1.15      13.4 +/-    1.15  0.070 / 0.080
G24     252.5          37.9               12.3 +/-    1.48      18.5 +/-    1.48  0.050 / 0.060
G28     127.5          10.9               11.6 +/-    2.26      31.7 +/-    2.26  0.050 / 0.060