PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-14:42:50
G01     58.2           29.6                8.4 +/-    1.17      14.8 +/-    1.17  0.110 / 0.170
G06     179.8          16.6               11.7 +/-    1.88      28.1 +/-    1.88  0.110 / 0.190
G07     142.7          17.9                9.8 +/-    2.02      22.7 +/-    2.02  0.030 / 0.040
G11     46.8           19.8                7.2 +/-    4.07      15.9 +/-    4.07  0.040 / 0.030
G13     262.9          34.3               10.6 +/-    0.70      17.1 +/-    0.70  0.080 / 0.190
G15     294.9          15.7                6.9 +/-    1.03      16.9 +/-    1.03  0.080 / 0.130
G17     276.6          79.4               10.7 +/-    0.67      10.8 +/-    0.67  0.080 / 0.140
G19     235.3          54.4               10.8 +/-    2.33      12.9 +/-    2.33  0.070 / 0.130
G28     38.9           55.9               10.4 +/-    2.02      12.3 +/-    2.02  0.020 / 0.020
G30     144.6          52.7               10.6 +/-    0.82      12.9 +/-    0.82  0.020 / 0.020