PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-13:43:00
G02     203.5          34.5               10.7 +/-    1.65      17.1 +/-    1.65  0.180 / 0.370
G06     162.3          68.9                8.5 +/-    1.31       9.0 +/-    1.31  0.140 / 0.350
G12     308.0          15.3                3.7 +/-    2.65       9.1 +/-    2.65  0.050 / 0.080
G17     39.0           46.7                3.7 +/-    0.45       4.9 +/-    0.45  0.080 / 0.090
G19     7.4            63.9                4.3 +/-    0.47       4.7 +/-    0.47  0.030 / 0.040
G24     299.1          37.3                5.3 +/-    2.06       8.1 +/-    2.06  0.040 / 0.040
G28     103.6          30.3                6.7 +/-    1.50      11.7 +/-    1.50  0.040 / 0.050