PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-23:42:40
G10     250.7          26.9               10.6 +/-    2.25      19.7 +/-    2.25  0.040 / 0.040
G13     53.3           29.7                7.7 +/-    1.71      13.7 +/-    1.71  0.040 / 0.040
G15     90.8           58.9                9.2 +/-    0.97      10.6 +/-    0.97  0.060 / 0.140
G16     294.0          16.0                8.1 +/-    1.17      19.7 +/-    1.17  0.080 / 0.140
G20     257.7          29.2                7.6 +/-    2.76      13.5 +/-    2.76  0.130 / 0.280
G21     332.6          59.6                8.4 +/-    0.49       9.5 +/-    0.49  0.120 / 0.270
G26     266.1          15.6                8.8 +/-    2.01      21.5 +/-    2.01  0.030 / 0.030
G29     165.3          50.9               10.5 +/-    0.46      13.1 +/-    0.46  0.030 / 0.040