PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-03:57:50
G02     202.6          37.2                8.2 +/-    1.18      12.5 +/-    1.18  0.060 / 0.120
G06     164.5          68.3                7.3 +/-    0.52       7.8 +/-    0.52  0.070 / 0.120
G12     307.6          14.5                1.8 +/-    2.19       4.5 +/-    2.19  0.040 / 0.050
G17     35.2           50.0                4.4 +/-    1.34       5.5 +/-    1.34  0.080 / 0.040
G19     3.6            64.7                3.9 +/-    0.72       4.2 +/-    0.72  0.040 / 0.030
G24     298.1          37.8                2.8 +/-    2.50       4.2 +/-    2.50  0.030 / 0.030
G28     103.5          30.2                6.4 +/-    1.89      11.2 +/-    1.89  0.140 / 0.300