PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-23:13:00
G01     127.8          11.1               14.3 +/-    5.67      39.1 +/-    5.67  0.100 / 0.120
G07     48.6           69.7                9.7 +/-    0.27      10.3 +/-    0.27  0.110 / 0.120
G08     52.7           42.7                7.9 +/-    1.25      11.0 +/-    1.25  0.240 / 0.350
G09     179.2          38.2               12.5 +/-    1.21      18.7 +/-    1.21  0.370 / 0.320
G11     122.9          34.0               14.1 +/-    2.32      22.8 +/-    2.32  0.120 / 0.320
G17     200.5          12.4               10.6 +/-    3.60      28.0 +/-    3.60  0.080 / 0.250
G28     275.6          52.9                9.9 +/-    4.12      12.1 +/-    4.12  0.040 / 0.040
G30     338.0          62.9                8.8 +/-    0.66       9.8 +/-    0.66  0.030 / 0.050