PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-13:57:40
G02     216.6          60.9               10.0 +/-    1.12      11.3 +/-    1.12  0.050 / 0.060
G06     57.7           75.5                7.3 +/-    0.67       7.5 +/-    0.67  0.050 / 0.060
G12     318.9          36.4                6.6 +/-    2.01      10.2 +/-    2.01  0.100 / 0.570
G17     60.1           29.6                6.2 +/-    0.90      10.9 +/-    0.90  0.100 / 0.460
G19     43.0           46.9                5.5 +/-    0.53       7.2 +/-    0.53  0.060 / 0.060
G24     266.2          41.2                8.2 +/-    1.68      11.6 +/-    1.68  0.030 / 0.090
G28     123.9          12.1                9.1 +/-    2.54      24.3 +/-    2.54  0.030 / 0.040