PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-01:27:50
G01     76.5           33.3                6.9 +/-    1.15      11.3 +/-    1.15  0.030 / 0.050
G07     134.5          35.6                8.4 +/-    1.65      13.2 +/-    1.65  0.030 / 0.050
G11     59.5           35.9                5.4 +/-    0.58       8.4 +/-    0.58  0.030 / 0.040
G13     281.5          37.4                6.8 +/-    1.23      10.3 +/-    1.23  0.040 / 0.050
G15     306.0          14.7                3.9 +/-    1.50       9.8 +/-    1.50  0.070 / 0.100
G17     226.0          63.0               10.5 +/-    1.58      11.7 +/-    1.58  0.060 / 0.090
G19     220.9          38.0                7.3 +/-    1.17      11.0 +/-    1.17  0.040 / 0.070
G28     12.2           60.1                6.1 +/-    0.61       6.9 +/-    0.61  0.050 / 0.080
G30     130.0          61.7                7.6 +/-    0.78       8.5 +/-    0.78  0.060 / 0.100