PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-04:27:30
G02     56.3           34.8                5.0 +/-    1.50       7.9 +/-    1.50  0.040 / 0.060
G05     65.4           63.8                6.1 +/-    0.52       6.7 +/-    0.52  0.050 / 0.060
G12     186.5          38.8                7.0 +/-    1.50      10.3 +/-    1.50  0.030 / 0.030
G13     132.7          11.5                7.4 +/-    2.42      20.1 +/-    2.42  0.030 / 0.020
G20     213.5          28.1                7.0 +/-    2.30      12.8 +/-    2.30  0.110 / 0.170
G21     267.1          14.2                7.1 +/-    2.52      18.1 +/-    2.52  0.090 / 0.200
G25     247.4          55.2                6.1 +/-    1.27       7.2 +/-    1.27  0.190 / 0.490
G29     324.8          49.4                4.9 +/-    1.01       6.3 +/-    1.01  0.130 / 0.480