PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-18:42:40
G02     274.4          79.7               10.2 +/-    0.96      10.3 +/-    0.96  0.090 / 0.180
G05     171.4          22.3               14.2 +/-    1.08      29.5 +/-    1.08  0.100 / 0.170
G06     40.4           48.3                9.8 +/-    0.62      12.6 +/-    0.62  0.070 / 0.100
G12     319.5          63.3                8.2 +/-    1.17       9.0 +/-    1.17  0.080 / 0.120
G17     80.8           14.0                8.9 +/-    2.18      22.8 +/-    2.18  0.030 / 0.040
G19     68.7           30.6               10.2 +/-    0.84      17.7 +/-    0.84  0.030 / 0.050
G24     237.2          29.1                9.4 +/-    1.89      16.8 +/-    1.89  0.070 / 0.140
G25     317.7          25.7                8.5 +/-    1.80      16.4 +/-    1.80  0.070 / 0.140