PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-14:27:40
G02     203.5          28.3                8.9 +/-    0.97      16.1 +/-    0.97  0.070 / 0.100
G06     157.7          67.5                9.8 +/-    0.80      10.5 +/-    0.80  0.090 / 0.130
G12     307.4          17.7                6.0 +/-    1.71      14.0 +/-    1.71  0.080 / 0.200
G17     35.2           49.7                7.2 +/-    0.63       9.1 +/-    0.63  0.100 / 0.190
G19     343.1          68.0                7.4 +/-    0.59       7.9 +/-    0.59  0.030 / 0.040
G24     299.5          38.0                6.8 +/-    0.83      10.2 +/-    0.83  0.040 / 0.040
G28     99.2           33.4                8.6 +/-    0.56      14.0 +/-    0.56  0.030 / 0.030