PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-22:58:00
G07     28.0           69.3               10.2 +/-    0.61      10.8 +/-    0.61  0.160 / 0.120
G08     59.6           47.4                9.0 +/-    0.60      11.7 +/-    0.60  0.110 / 0.090
G09     180.2          45.5               13.9 +/-    1.21      18.6 +/-    1.21  0.140 / 0.160
G11     129.2          29.7               15.2 +/-    2.65      26.8 +/-    2.65  0.180 / 0.200
G23     159.9          13.5               13.4 +/-    1.48      34.6 +/-    1.48  0.040 / 0.040
G27     38.6           12.7                7.9 +/-    3.26      20.7 +/-    3.26  0.040 / 0.050
G28     265.7          49.0               10.9 +/-    5.14      13.9 +/-    5.14  0.030 / 0.030
G30     329.5          57.6                9.6 +/-    0.36      11.1 +/-    0.36  0.030 / 0.030