PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-19:27:50
G02     248.7          75.5               12.0 +/-    0.42      12.3 +/-    0.42  0.030 / 0.040
G05     172.7          17.8               18.1 +/-    3.22      42.0 +/-    3.22  0.050 / 0.040
G06     40.3           53.5               11.2 +/-    1.20      13.6 +/-    1.20  0.090 / 0.160
G12     321.5          58.1               10.5 +/-    0.80      12.1 +/-    0.80  0.110 / 0.120
G17     76.4           17.2               10.7 +/-    2.17      25.1 +/-    2.17  0.050 / 0.050
G19     63.5           34.0               11.1 +/-    2.90      18.0 +/-    2.90  0.080 / 0.060
G24     242.5          32.6               11.9 +/-    2.52      19.8 +/-    2.52  0.140 / 0.270
G25     317.5          20.9               10.8 +/-    2.10      23.2 +/-    2.10  0.330 / 0.320