PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-16:57:50
G01     44.4           20.1                9.1 +/-    3.06      19.9 +/-    3.06  0.140 / 0.270
G06     175.9          33.4               11.4 +/-    2.49      18.6 +/-    2.49  0.160 / 0.260
G13     244.7          25.8                9.4 +/-    2.06      18.1 +/-    2.06  0.230 / 0.200
G15     280.0          13.8                9.2 +/-    1.06      23.6 +/-    1.06  0.220 / 0.210
G17     356.1          73.4               10.7 +/-    0.36      11.1 +/-    0.36  0.070 / 0.210
G19     265.5          67.8                9.9 +/-    0.73      10.6 +/-    0.73  0.070 / 0.200
G24     318.7          12.9                7.9 +/-    5.21      20.5 +/-    5.21  0.060 / 0.070
G28     63.9           49.5               10.7 +/-    0.83      13.5 +/-    0.83  0.060 / 0.090
G30     153.1          35.8               10.9 +/-    0.68      17.1 +/-    0.68  0.030 / 0.030