PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-01:27:50
G01     61.2           30.9                6.6 +/-    0.75      11.3 +/-    0.75  0.050 / 0.050
G06     181.5          12.9                8.5 +/-    4.26      22.4 +/-    4.26  0.060 / 0.060
G07     141.9          23.5                9.2 +/-    1.46      18.6 +/-    1.46  0.040 / 0.030
G11     50.1           27.0                4.2 +/-    2.11       7.9 +/-    2.11  0.040 / 0.040
G13     264.6          35.4                8.7 +/-    1.37      13.7 +/-    1.37  0.120 / 0.270
G15     294.1          16.7                4.8 +/-    1.66      11.5 +/-    1.66  0.100 / 0.330
G17     252.5          73.9                7.9 +/-    0.71       8.1 +/-    0.71  0.050 / 0.070
G19     231.9          50.1               10.5 +/-    1.27      13.2 +/-    1.27  0.050 / 0.080
G28     35.2           56.7                5.8 +/-    0.68       6.8 +/-    0.68  0.080 / 0.180
G30     142.2          49.1                9.3 +/-    1.19      11.8 +/-    1.19  0.070 / 0.170