PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-04:57:40
G01     87.2           32.4                4.5 +/-    1.59       7.6 +/-    1.59  0.060 / 0.040
G07     127.7          42.9                8.2 +/-    0.60      11.4 +/-    0.60  0.060 / 0.050
G11     66.9           38.9                4.9 +/-    1.43       7.3 +/-    1.43  0.040 / 0.040
G13     293.0          35.9                4.2 +/-    1.83       6.5 +/-    1.83  0.050 / 0.040
G15     313.2          11.6                1.3 +/-    3.91       3.5 +/-    3.91  0.370 / 0.250
G17     216.6          56.8                6.2 +/-    0.80       7.2 +/-    0.80  0.140 / 0.430
G19     215.8          30.5                4.1 +/-    3.37       7.2 +/-    3.37  0.080 / 0.100
G28     355.6          61.4                3.4 +/-    0.90       3.8 +/-    0.90  0.080 / 0.080
G30     113.4          72.1                5.8 +/-    0.59       6.1 +/-    0.59  0.080 / 0.080