PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-02:42:40
G10     285.7          48.3               10.6 +/-    2.56      13.7 +/-    2.56  0.070 / 0.040
G15     48.2           35.2                9.3 +/-    0.99      14.6 +/-    0.99  0.070 / 0.070
G20     330.2          64.7               10.8 +/-    0.53      11.8 +/-    0.53  0.150 / 0.050
G21     58.1           77.1               10.5 +/-    0.32      10.7 +/-    0.32  0.090 / 0.040
G24     107.2          22.5                8.5 +/-    1.31      17.6 +/-    1.31  0.040 / 0.040
G27     310.0          28.8                8.1 +/-    0.54      14.6 +/-    0.54  0.040 / 0.040
G29     167.3          14.7               10.3 +/-    1.28      25.8 +/-    1.28  0.050 / 0.030
G32     207.6          21.0               15.1 +/-    2.05      32.4 +/-    2.05  0.060 / 0.050