PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/28-09:27:50
G02     202.6          35.8                7.3 +/-    0.67      11.5 +/-    0.67  0.060 / 0.110
G06     169.6          66.0                6.8 +/-    0.53       7.4 +/-    0.53  0.060 / 0.110
G12     307.3          14.0                2.7 +/-    2.83       6.9 +/-    2.83  0.070 / 0.080
G17     37.4           48.1                4.4 +/-    1.74       5.7 +/-    1.74  0.090 / 0.080
G19     5.0            64.5                4.3 +/-    0.71       4.7 +/-    0.71  0.090 / 0.180
G24     299.5          37.1                3.4 +/-    2.95       5.2 +/-    2.95  0.120 / 0.240
G28     103.0          30.5                6.3 +/-    0.75      10.9 +/-    0.75  0.040 / 0.030