PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-23:27:30
G01     128.3          10.7                3.8 +/-   37.94      10.4 +/-   37.94  0.080 / 0.080
G07     46.8           69.7               10.7 +/-    0.41      11.4 +/-    0.41  0.140 / 0.110
G08     53.1           42.9                9.5 +/-    1.16      13.3 +/-    1.16  0.040 / 0.040
G09     179.3          38.8               13.2 +/-    1.36      19.6 +/-    1.36  0.030 / 0.060
G11     123.3          33.6               13.1 +/-    1.61      21.4 +/-    1.61  0.100 / 0.310
G17     200.4          12.0                6.0 +/-   23.95      16.0 +/-   23.95  0.110 / 0.300
G28     274.6          52.5               10.0 +/-    3.96      12.3 +/-    3.96  0.190 / 0.370
G30     337.5          62.5                9.2 +/-    0.76      10.3 +/-    0.76  0.200 / 0.370