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                2.0 +/-   19.60       4.2 +/-   19.60  0.070 / 0.150
G06     176.2          31.5                2.0 +/-   23.43       3.4 +/-   23.43  0.160 / 0.220
G13     246.5          27.0               10.5 +/-    2.31      19.7 +/-    2.31  0.080 / 0.180
G15     281.8          14.2               10.7 +/-    0.95      27.2 +/-    0.95  0.090 / 0.180
G17     351.1          74.8               26.8 +/-   20.54      27.7 +/-   20.54  0.060 / 0.070
G19     260.9          66.7              -31.0 +/-   55.02     -33.5 +/-   55.02  0.050 / 0.070
G24     319.0          11.4               -1.5 +/-   35.50      -3.9 +/-   35.50  0.210 / 0.350
G28     61.3           50.3                6.4 +/-    5.79       8.1 +/-    5.79  0.240 / 0.370
G30     152.4          37.7               11.4 +/-    0.99      17.3 +/-    0.99  0.170 / 0.270