PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/19-08:57:50
G01     71.6           33.0                4.1 +/-    0.82       6.7 +/-    0.82  0.030 / 0.040
G07     136.9          30.5                6.3 +/-    1.06      10.9 +/-    1.06  0.040 / 0.040
G11     53.1           30.1                3.7 +/-    0.61       6.4 +/-    0.61  0.070 / 0.110
G13     274.9          37.9                5.7 +/-    1.27       8.6 +/-    1.27  0.050 / 0.110
G15     306.4          13.2                1.5 +/-    2.03       3.8 +/-    2.03  0.050 / 0.080
G17     232.9          70.9                5.8 +/-    0.85       6.1 +/-    0.85  0.050 / 0.080
G18     48.0           17.2                1.9 +/-    0.98       4.5 +/-    0.98  0.050 / 0.100
G19     223.3          37.6                6.4 +/-    1.17       9.7 +/-    1.17  0.060 / 0.130
G28     15.7           59.9                3.5 +/-    0.87       4.0 +/-    0.87  0.110 / 0.190
G30     134.9          64.4                5.5 +/-    0.85       6.0 +/-    0.85  0.100 / 0.210