PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-04:43:00
G01     91.0           31.6                6.1 +/-    0.87      10.3 +/-    0.87  0.030 / 0.040
G07     124.9          45.8                7.2 +/-    1.15       9.5 +/-    1.15  0.040 / 0.040
G11     70.7           40.2                5.7 +/-    1.20       8.3 +/-    1.20  0.060 / 0.040
G13     296.6          34.9                4.6 +/-    5.58       7.3 +/-    5.58  0.040 / 0.040
G17     214.1          53.5                7.8 +/-    1.12       9.5 +/-    1.12  0.080 / 0.090
G19     214.2          27.5                6.3 +/-    1.47      11.7 +/-    1.47  0.080 / 0.080
G28     349.3          61.7                3.5 +/-    0.43       3.9 +/-    0.43  0.070 / 0.090
G30     104.8          74.4                5.6 +/-    0.75       5.8 +/-    0.75  0.070 / 0.120