PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-14:28:00
G02     285.7          81.4                8.1 +/-    0.45       8.2 +/-    0.45  0.030 / 0.030
G05     170.7          22.6               10.4 +/-    1.17      21.6 +/-    1.17  0.020 / 0.040
G06     39.6           51.2                5.8 +/-    0.48       7.2 +/-    0.48  0.040 / 0.110
G12     319.7          60.8                7.2 +/-    0.73       8.2 +/-    0.73  0.050 / 0.120
G17     80.1           14.8                6.2 +/-    2.01      15.6 +/-    2.01  0.100 / 0.210
G19     67.9           31.3                7.9 +/-    0.56      13.4 +/-    0.56  0.070 / 0.190
G24     237.8          29.4                7.1 +/-    1.16      12.7 +/-    1.16  0.070 / 0.130
G25     317.8          22.5                4.5 +/-    1.38       9.3 +/-    1.38  0.070 / 0.130