PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-10:57:30
G01     40.5           15.2                2.6 +/-    1.44       6.3 +/-    1.44  0.030 / 0.040
G06     176.8          38.8                9.0 +/-    1.72      13.4 +/-    1.72  0.030 / 0.030
G13     238.2          21.2                7.9 +/-    1.52      16.8 +/-    1.52  0.160 / 0.300
G15     270.0          12.0                6.4 +/-    1.36      17.2 +/-    1.36  0.150 / 0.410
G17     9.3            67.9                4.7 +/-    0.73       5.0 +/-    0.73  0.050 / 0.070
G19     286.6          71.0                5.3 +/-    0.39       5.5 +/-    0.39  0.050 / 0.070
G24     316.8          19.0                3.8 +/-    2.22       8.7 +/-    2.22  0.150 / 0.210
G28     74.2           45.7                5.3 +/-    1.03       7.1 +/-    1.03  0.170 / 0.250
G30     154.9          26.5                8.6 +/-    1.04      16.2 +/-    1.04  0.050 / 0.070