PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:43:00
G01     88.8           32.2               11.1 +/-    1.51      18.6 +/-    1.51  0.050 / 0.040
G07     126.5          45.0               13.6 +/-    0.82      18.4 +/-    0.82  0.060 / 0.060
G11     68.5           40.1               10.9 +/-    1.71      15.9 +/-    1.71  0.060 / 0.070
G13     293.5          36.2               13.0 +/-    4.18      20.2 +/-    4.18  0.050 / 0.060
G17     216.1          50.9               15.5 +/-    0.92      19.4 +/-    0.92  0.050 / 0.170
G18     63.0           23.8                9.6 +/-    1.24      19.3 +/-    1.24  0.050 / 0.210
G19     215.3          27.0               16.3 +/-    2.16      30.5 +/-    2.16  0.050 / 0.050
G28     352.1          61.6               11.2 +/-    0.27      12.5 +/-    0.27  0.060 / 0.050
G30     109.5          74.1               13.1 +/-    0.38      13.6 +/-    0.38  0.030 / 0.030