PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-11:27:40
G08     272.3          17.5                6.1 +/-    3.29      14.2 +/-    3.29  0.040 / 0.040
G10     61.3           58.5                3.9 +/-    0.86       4.5 +/-    0.86  0.050 / 0.040
G11     312.8          15.6                2.1 +/-    1.23       5.1 +/-    1.23  0.140 / 0.340
G14     263.3          63.4                5.5 +/-    0.72       6.1 +/-    0.72  0.140 / 0.350
G18     312.7          31.0                3.8 +/-    1.50       6.5 +/-    1.50  0.220 / 0.440
G21     154.5          14.6                3.1 +/-    3.42       7.7 +/-    3.42  0.190 / 0.400
G24     39.7           10.0                2.6 +/-    4.76       7.4 +/-    4.76  0.180 / 0.230
G27     231.0          15.5                5.1 +/-    3.20      12.6 +/-    3.20  0.240 / 0.250
G31     177.0          32.1                5.9 +/-    1.90       9.9 +/-    1.90  0.080 / 0.330
G32     345.2          73.6                4.6 +/-    0.38       4.8 +/-    0.38  0.090 / 0.410