PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-12:28:10
G02     201.6          17.0                3.4 +/-    3.31       7.9 +/-    3.31  0.100 / 0.100
G06     169.5          54.4                6.1 +/-    0.57       7.3 +/-    0.57  0.070 / 0.110
G13     227.1          13.3                2.7 +/-   11.07       6.9 +/-   11.07  0.140 / 0.160
G17     23.8           58.7                3.7 +/-    0.70       4.2 +/-    0.70  0.230 / 0.230
G19     307.0          69.8                2.8 +/-    0.76       3.0 +/-    0.76  0.230 / 0.960
G24     308.6          31.7                3.3 +/-    1.67       5.6 +/-    1.67  0.240 / 0.550
G28     86.9           40.7                2.8 +/-    1.55       4.0 +/-    1.55  0.040 / 0.040
G30     157.7          16.3                4.9 +/-    1.03      11.8 +/-    1.03  0.040 / 0.040