PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-12:58:00
G08     262.7          13.8                4.6 +/-    1.62      11.8 +/-    1.62  0.030 / 0.050
G10     77.3           54.3                3.5 +/-    0.58       4.2 +/-    0.58  0.030 / 0.040
G11     306.4          20.6                2.5 +/-    1.42       5.4 +/-    1.42  0.080 / 0.090
G14     286.4          68.5                4.0 +/-    0.45       4.3 +/-    0.45  0.090 / 0.100
G18     102.0          27.3                1.6 +/-    1.29       2.9 +/-    1.29  0.240 / 0.330
G22     300.7          12.3                4.7 +/-    2.36      12.4 +/-    2.36  0.190 / 0.350
G31     175.1          41.7                6.2 +/-    0.91       8.8 +/-    0.91  0.110 / 0.300
G32     7.6            67.7                3.3 +/-    0.43       3.5 +/-    0.43  0.100 / 0.300