PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-01:57:50
G01     106.2          26.0                5.4 +/-    1.50      10.3 +/-    1.50  0.050 / 0.050
G07     108.0          57.7                5.8 +/-    0.41       6.7 +/-    0.41  0.040 / 0.050
G08     42.1           20.8                3.2 +/-    2.67       6.9 +/-    2.67  0.080 / 0.130
G09     175.4          13.8                6.6 +/-    0.66      16.9 +/-    0.66  0.070 / 0.130
G11     90.5           43.1                7.9 +/-    1.28      10.9 +/-    1.28  0.070 / 0.070
G13     309.6          28.3                2.6 +/-    0.93       4.8 +/-    0.93  0.080 / 0.070
G17     206.5          38.1                8.0 +/-    0.54      12.1 +/-    0.54  0.250 / 0.110
G19     209.3          14.3                5.5 +/-    2.26      13.8 +/-    2.26  0.160 / 0.130
G28     321.1          61.3                3.7 +/-    0.79       4.1 +/-    0.79  0.030 / 0.040
G30     47.5           78.1                5.0 +/-    0.80       5.1 +/-    0.80  0.040 / 0.030