PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-22:42:30
G02     253.1          78.5               13.6 +/-    0.62      13.8 +/-    0.62  0.110 / 0.340
G05     169.8          19.1               22.2 +/-    2.98      49.9 +/-    2.98  0.160 / 0.500
G06     39.5           57.7               13.1 +/-    0.58      15.1 +/-    0.58  0.160 / 0.150
G12     320.7          51.9               14.2 +/-    0.95      17.5 +/-    0.95  0.130 / 0.120
G17     72.8           20.6               11.5 +/-    1.15      25.0 +/-    1.15  0.050 / 0.060
G19     59.9           36.3               12.1 +/-    0.44      18.8 +/-    0.44  0.040 / 0.060
G24     241.5          33.0               17.0 +/-    1.67      28.0 +/-    1.67  0.030 / 0.030
G25     316.8          14.7                9.3 +/-    1.42      23.2 +/-    1.42  0.030 / 0.040