PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-14:43:10
G02     205.7          37.0                9.0 +/-    1.15      13.8 +/-    1.15  0.130 / 0.160
G06     146.2          74.1                8.0 +/-    0.40       8.3 +/-    0.40  0.120 / 0.180
G12     309.4          18.7                6.5 +/-    1.49      14.8 +/-    1.49  0.050 / 0.040
G17     37.0           48.5                6.6 +/-    1.38       8.4 +/-    1.38  0.060 / 0.040
G19     13.9           61.3                7.7 +/-    0.62       8.6 +/-    0.62  0.070 / 0.090
G24     292.8          39.4                7.0 +/-    1.58      10.3 +/-    1.58  0.080 / 0.080
G28     103.8          33.7                8.7 +/-    0.67      14.2 +/-    0.67  0.030 / 0.030