PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-22:57:50
G01     225.7          16.4                8.4 +/-    4.28      20.1 +/-    4.28  0.040 / 0.030
G03     284.5          68.1                5.3 +/-    0.41       5.7 +/-    0.41  0.030 / 0.020
G14     87.7           23.4                7.1 +/-    2.38      14.3 +/-    2.38  0.080 / 0.090
G16     150.7          44.3                8.8 +/-    0.75      12.0 +/-    0.75  0.060 / 0.090
G22     215.9          70.3                5.6 +/-    0.73       6.0 +/-    0.73  0.030 / 0.070
G23     307.7          37.4                6.1 +/-    1.56       9.3 +/-    1.56  0.040 / 0.060
G26     98.9           55.0                8.2 +/-    1.33       9.8 +/-    1.33  0.100 / 0.180
G31     44.9           33.2                4.6 +/-    0.84       7.6 +/-    0.84  0.100 / 0.190