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 +/-   24.67       1.7 +/-   24.67  0.200 / 0.300
G08     259.4          14.5                9.0 +/-    1.45      22.7 +/-    1.45  0.250 / 0.400
G10     75.8           54.5                5.7 +/-    0.42       6.8 +/-    0.42  0.030 / 0.050
G11     305.1          22.0                3.5 +/-    1.59       7.3 +/-    1.59  0.040 / 0.040
G14     283.9          68.5                6.4 +/-    0.55       6.9 +/-    0.55  0.080 / 0.260
G18     307.0          38.3                5.6 +/-    1.16       8.3 +/-    1.16  0.070 / 0.310
G20     94.1           48.2               12.1 +/-    1.03      15.6 +/-    1.03  0.040 / 0.040
G27     225.9          10.4                8.2 +/-    2.82      22.6 +/-    2.82  0.050 / 0.040
G31     174.6          41.1                8.2 +/-    0.85      11.7 +/-    0.85  0.160 / 0.390
G32     6.9            68.2                6.4 +/-    0.74       6.9 +/-    0.74  0.150 / 0.350