PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-23:27:50
G10     252.0          29.3               11.7 +/-    1.93      20.8 +/-    1.93  0.040 / 0.050
G13     51.6           27.9                8.0 +/-    2.39      14.7 +/-    2.39  0.040 / 0.040
G15     82.4           56.9               11.6 +/-    0.89      13.5 +/-    0.89  0.090 / 0.210
G16     294.8          15.4                6.2 +/-    1.98      15.3 +/-    1.98  0.120 / 0.200
G20     272.0          51.4               11.6 +/-    2.93      14.4 +/-    2.93  0.030 / 0.040
G21     335.5          60.7                9.6 +/-    1.00      10.8 +/-    1.00  0.030 / 0.030
G26     267.0          14.8                8.7 +/-    2.24      21.7 +/-    2.24  0.100 / 0.390
G29     163.6          47.6               12.6 +/-    0.64      16.4 +/-    0.64  0.120 / 0.310