PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-04:57:30
G01     82.6           33.0                5.0 +/-    1.02       8.3 +/-    1.02  0.030 / 0.040
G07     130.8          39.6                7.4 +/-    0.62      10.8 +/-    0.62  0.030 / 0.040
G11     62.9           37.1                4.9 +/-    0.96       7.4 +/-    0.96  0.070 / 0.040
G13     288.4          36.7                6.2 +/-    1.04       9.5 +/-    1.04  0.070 / 0.050
G15     310.3          13.0                3.1 +/-    1.93       8.0 +/-    1.93  0.310 / 0.370
G17     220.2          60.5                7.5 +/-    1.24       8.5 +/-    1.24  0.160 / 0.260
G19     217.8          34.0                6.4 +/-    1.29      10.4 +/-    1.29  0.040 / 0.100
G28     2.9            60.9                3.1 +/-    0.54       3.5 +/-    0.54  0.060 / 0.080
G30     121.5          68.7                6.9 +/-    0.57       7.3 +/-    0.57  0.060 / 0.090