PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-04:28:00
G01     319.8          15.7                0.7 +/-   24.21       1.7 +/-   24.21  0.160 / 0.210
G08     259.4          14.5                9.1 +/-    1.23      22.9 +/-    1.23  0.210 / 0.320
G10     75.8           54.5                7.3 +/-    0.58       8.8 +/-    0.58  0.040 / 0.060
G11     305.1          22.0                7.8 +/-    1.69      16.4 +/-    1.69  0.030 / 0.050
G14     283.9          68.5                7.4 +/-    0.40       7.9 +/-    0.40  0.110 / 0.200
G18     307.0          38.3                5.7 +/-    1.06       8.6 +/-    1.06  0.100 / 0.160
G20     94.1           48.2               15.4 +/-    1.00      19.9 +/-    1.00  0.140 / 0.390
G31     174.6          41.1                7.5 +/-    0.88      10.7 +/-    0.88  0.140 / 0.330
G32     6.9            68.2                6.9 +/-    0.61       7.3 +/-    0.61  0.090 / 0.080