PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/14-14:28:00
G01     69.9           32.6                8.2 +/-    1.16      13.6 +/-    1.16  0.060 / 0.150
G07     137.5          27.5                8.2 +/-    2.00      15.2 +/-    2.00  0.050 / 0.100
G11     52.4           27.8                6.1 +/-    1.29      11.2 +/-    1.29  0.070 / 0.110
G13     276.3          36.8                9.9 +/-    1.68      15.2 +/-    1.68  0.080 / 0.130
G15     304.6          14.3                5.3 +/-    2.59      13.4 +/-    2.59  0.030 / 0.040
G17     236.3          72.3                9.3 +/-    0.64       9.7 +/-    0.64  0.030 / 0.040
G19     224.7          44.6               12.1 +/-    1.89      16.4 +/-    1.89  0.060 / 0.070
G28     20.8           59.0                8.4 +/-    0.38       9.6 +/-    0.38  0.060 / 0.080
G30     135.0          63.6                8.7 +/-    0.74       9.6 +/-    0.74  0.040 / 0.040