PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-18:58:00
G01     128.4          10.7                8.4 +/-   33.72      23.0 +/-   33.72  0.140 / 0.270
G07     46.1           69.9               12.0 +/-    0.57      12.7 +/-    0.57  0.150 / 0.280
G08     53.9           44.0               10.9 +/-    1.02      14.9 +/-    1.02  0.040 / 0.040
G09     178.8          38.3               13.9 +/-    0.99      20.8 +/-    0.99  0.050 / 0.050
G11     121.8          34.0               14.4 +/-    1.48      23.3 +/-    1.48  0.220 / 0.440
G18     105.8          15.8               13.4 +/-    3.19      32.8 +/-    3.19  0.210 / 0.450
G28     274.2          52.3               12.8 +/-    2.84      15.8 +/-    2.84  0.030 / 0.030
G30     333.3          60.4               10.5 +/-    0.56      11.8 +/-    0.56  0.030 / 0.030