PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-15:58:00
G01     72.1           32.8                9.0 +/-    0.73      15.0 +/-    0.73  0.060 / 0.110
G07     136.4          28.6                9.8 +/-    1.49      17.7 +/-    1.49  0.070 / 0.110
G11     53.4           28.7                6.2 +/-    0.59      11.2 +/-    0.59  0.040 / 0.050
G13     278.4          37.0               10.1 +/-    0.91      15.5 +/-    0.91  0.050 / 0.060
G15     307.1          13.3                7.5 +/-    1.39      19.3 +/-    1.39  0.060 / 0.150
G17     232.3          70.6               10.3 +/-    0.69      10.9 +/-    0.69  0.060 / 0.190
G19     223.3          42.9               11.4 +/-    1.88      15.9 +/-    1.88  0.060 / 0.120
G28     17.1           59.5                9.0 +/-    0.51      10.2 +/-    0.51  0.050 / 0.120
G30     132.5          65.8                8.8 +/-    0.81       9.6 +/-    0.81  0.030 / 0.040