PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:12:30
G01     128.4          10.7                5.0 +/-   39.64      13.8 +/-   39.64  0.050 / 0.060
G07     46.2           69.9               13.1 +/-    0.57      13.8 +/-    0.57  0.040 / 0.060
G08     53.5           43.5               10.6 +/-    0.90      14.7 +/-    0.90  0.040 / 0.040
G09     178.7          38.1               15.3 +/-    1.17      22.9 +/-    1.17  0.030 / 0.030
G11     121.5          34.1               14.3 +/-    0.74      23.1 +/-    0.74  0.130 / 0.260
G18     105.8          15.8               12.9 +/-    2.16      31.5 +/-    2.16  0.140 / 0.290
G28     274.1          52.2               14.0 +/-    2.48      17.2 +/-    2.48  0.080 / 0.100
G30     332.7          60.1               11.8 +/-    0.64      13.4 +/-    0.64  0.100 / 0.100