PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/26-22:58:00
G01     128.8          10.3              -18.7 +/-   23.16     -51.8 +/-   23.16  0.040 / 0.050
G07     44.7           69.8                9.5 +/-    0.66      10.0 +/-    0.66  0.040 / 0.050
G08     53.9           43.7                7.6 +/-    0.70      10.4 +/-    0.70  0.050 / 0.070
G09     179.4          39.5               10.6 +/-    1.27      15.5 +/-    1.27  0.040 / 0.080
G11     124.2          33.2               11.2 +/-    0.83      18.4 +/-    0.83  0.320 / 0.390
G17     200.4          11.1                5.2 +/-   30.46      14.1 +/-   30.46  0.230 / 0.270
G28     273.7          52.2                9.5 +/-    0.97      11.6 +/-    0.97  0.150 / 0.340
G30     336.1          61.8                7.3 +/-    0.36       8.2 +/-    0.36  0.020 / 0.040