PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-03:27:40
G01     125.8          12.7                7.9 +/-    1.87      20.9 +/-    1.87  0.140 / 0.090
G07     58.0           69.0                5.3 +/-    0.60       5.7 +/-    0.60  0.080 / 0.100
G08     49.5           38.5                4.6 +/-    1.16       6.9 +/-    1.16  0.050 / 0.050
G09     178.5          35.2                6.8 +/-    0.92      10.8 +/-    0.92  0.040 / 0.050
G11     117.7          35.4                7.9 +/-    0.67      12.4 +/-    0.67  0.110 / 0.250
G13     321.2          11.7               -1.0 +/-   13.20      -2.6 +/-   13.20  0.120 / 0.250
G17     200.0          17.0                4.9 +/-    1.59      11.7 +/-    1.59  0.190 / 0.320
G28     279.7          54.2                5.4 +/-    3.30       6.5 +/-    3.30  0.250 / 0.250
G30     338.3          63.3                4.5 +/-    0.38       4.9 +/-    0.38  0.100 / 0.080