PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/13-21:58:00
G01     128.3          10.7                7.4 +/-   32.72      20.3 +/-   32.72  0.080 / 0.070
G07     46.4           69.8               11.8 +/-    0.28      12.5 +/-    0.28  0.110 / 0.080
G08     53.8           43.9               11.1 +/-    0.83      15.2 +/-    0.83  0.220 / 0.430
G09     179.2          38.8               15.3 +/-    1.34      22.7 +/-    1.34  0.200 / 0.410
G11     123.3          33.7               14.0 +/-    0.99      22.8 +/-    0.99  0.050 / 0.040
G17     200.7          11.0               -0.5 +/-   28.96      -1.5 +/-   28.96  0.040 / 0.050
G28     274.5          52.5               11.8 +/-    3.89      14.5 +/-    3.89  0.130 / 0.270
G30     335.9          61.8               10.8 +/-    0.84      12.1 +/-    0.84  0.130 / 0.250