PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-20:12:30
G02     272.1          80.2                8.4 +/-    0.65       8.5 +/-    0.65  0.220 / 0.220
G05     168.5          22.8               13.3 +/-    2.01      27.3 +/-    2.01  0.150 / 0.160
G06     39.4           51.8               10.0 +/-    0.75      12.3 +/-    0.75  0.030 / 0.030
G12     320.3          57.0                9.3 +/-    0.64      10.9 +/-    0.64  0.040 / 0.030
G17     75.6           19.4                7.7 +/-    2.34      17.2 +/-    2.34  0.130 / 0.120
G19     64.4           33.1                8.2 +/-    1.37      13.5 +/-    1.37  0.100 / 0.130
G24     238.1          30.3               12.6 +/-    1.90      21.9 +/-    1.90  0.030 / 0.060
G25     317.2          17.9                9.3 +/-    2.75      21.6 +/-    2.75  0.040 / 0.060