PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-16:57:50
G01     45.6           21.4                9.8 +/-    4.30      20.8 +/-    4.30  0.070 / 0.200
G06     176.2          31.5                4.7 +/-   19.85       8.0 +/-   19.85  0.100 / 0.240
G13     246.5          27.0               12.2 +/-    1.85      22.8 +/-    1.85  0.070 / 0.080
G15     281.8          14.2               12.6 +/-    9.99      32.0 +/-    9.99  0.070 / 0.100
G17     351.1          74.8               15.8 +/-    6.79      16.3 +/-    6.79  0.220 / 0.370
G19     260.9          66.7              -22.5 +/-   53.72     -24.3 +/-   53.72  0.210 / 0.350
G24     319.0          11.4               -0.6 +/-   33.05      -1.7 +/-   33.05  0.030 / 0.030
G28     61.3           50.3                7.1 +/-    7.23       8.9 +/-    7.23  0.030 / 0.040
G30     152.4          37.7               12.6 +/-    0.68      19.0 +/-    0.68  0.080 / 0.180