PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-07:58:00
G01     249.4          34.6                5.4 +/-    2.31       8.6 +/-    2.31  0.110 / 0.210
G03     315.7          42.5                3.6 +/-    2.48       5.1 +/-    2.48  0.080 / 0.210
G11     233.6          12.3                3.8 +/-    4.90      10.0 +/-    4.90  0.030 / 0.060
G14     62.8           38.6                2.5 +/-    0.95       3.8 +/-    0.95  0.040 / 0.050
G16     163.1          19.1                4.3 +/-    2.52       9.7 +/-    2.52  0.120 / 0.320
G22     302.7          68.4                4.4 +/-    1.07       4.7 +/-    1.07  0.140 / 0.330
G23     286.9          19.0                5.1 +/-    1.86      11.6 +/-    1.86  0.060 / 0.150
G26     136.5          38.4                4.4 +/-    0.80       6.5 +/-    0.80  0.060 / 0.170
G31     40.4           57.3                2.1 +/-    1.08       2.5 +/-    1.08  0.070 / 0.100
G32     78.0           22.7                1.3 +/-    2.05       2.7 +/-    2.05  0.060 / 0.120