PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-12:12:40
G01     70.1           32.7                3.6 +/-    1.14       5.9 +/-    1.14  0.040 / 0.110
G07     137.5          28.4                4.5 +/-    1.11       8.1 +/-    1.11  0.040 / 0.120
G11     52.7           28.4                2.0 +/-    1.31       3.6 +/-    1.31  0.100 / 0.370
G13     276.5          36.7                6.7 +/-    2.01      10.3 +/-    2.01  0.120 / 0.380
G15     303.5          14.9                0.7 +/-    2.03       1.8 +/-    2.03  0.030 / 0.040
G17     236.1          72.1                5.3 +/-    0.66       5.6 +/-    0.66  0.030 / 0.040
G19     224.7          44.4                8.0 +/-    1.69      10.9 +/-    1.69  0.030 / 0.040
G28     21.1           58.9                4.0 +/-    0.57       4.6 +/-    0.57  0.030 / 0.040
G30     135.1          62.9                4.6 +/-    0.52       5.2 +/-    0.52  0.050 / 0.070