PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-16:27:50
G01     44.8           20.6                9.0 +/-    7.55      19.5 +/-    7.55  0.150 / 0.250
G06     176.1          32.7                9.6 +/-    7.50      16.0 +/-    7.50  0.170 / 0.250
G13     245.4          26.2               10.9 +/-    5.68      20.7 +/-    5.68  0.060 / 0.060
G15     280.3          14.0               11.6 +/-    1.62      29.6 +/-    1.62  0.060 / 0.060
G17     354.6          73.9               12.5 +/-    6.47      12.9 +/-    6.47  0.380 / 0.350
G19     263.9          67.4                8.2 +/-   20.39       8.8 +/-   20.39  0.260 / 0.280
G24     318.8          12.4                7.8 +/-   16.10      20.5 +/-   16.10  0.070 / 0.180
G28     63.1           49.8                9.2 +/-    1.85      11.7 +/-    1.85  0.070 / 0.190
G30     152.9          36.3                9.9 +/-    0.82      15.3 +/-    0.82  0.120 / 0.180