PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-05:13:10
G01     96.2           30.1                9.3 +/-    0.73      16.2 +/-    0.73  0.030 / 0.030
G07     120.2          49.6               10.0 +/-    0.90      12.7 +/-    0.90  0.040 / 0.040
G08     42.0           11.7                2.8 +/-    0.73       7.6 +/-    0.73  0.030 / 0.030
G11     76.1           41.4                6.7 +/-    1.06       9.6 +/-    1.06  0.030 / 0.040
G13     301.5          33.0                4.2 +/-    1.03       7.0 +/-    1.03  0.060 / 0.110
G17     210.9          49.2               10.5 +/-    0.40      13.4 +/-    0.40  0.050 / 0.120
G19     212.3          23.3                7.9 +/-    1.94      16.1 +/-    1.94  0.040 / 0.110
G28     340.1          61.8                5.0 +/-    0.61       5.6 +/-    0.61  0.070 / 0.100
G30     86.2           77.5                8.1 +/-    0.46       8.3 +/-    0.46  0.140 / 0.220