PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-01:57:50
G01     62.5           31.3                4.7 +/-    1.34       7.9 +/-    1.34  0.040 / 0.050
G06     182.1          11.5               -6.1 +/-   29.83     -16.4 +/-   29.83  0.040 / 0.050
G07     141.3          24.6                8.0 +/-    1.44      15.9 +/-    1.44  0.040 / 0.030
G11     50.7           27.7                3.5 +/-    3.38       6.4 +/-    3.38  0.030 / 0.030
G13     266.2          35.8                8.1 +/-    1.29      12.7 +/-    1.29  0.130 / 0.310
G15     295.2          16.7                4.9 +/-    0.88      11.8 +/-    0.88  0.160 / 0.300
G17     249.3          73.4                8.0 +/-    0.50       8.3 +/-    0.50  0.070 / 0.070
G19     230.7          49.1                7.3 +/-    2.78       9.4 +/-    2.78  0.070 / 0.070
G28     33.2           57.0                5.8 +/-    1.38       6.7 +/-    1.38  0.070 / 0.090
G30     141.2          50.0                9.1 +/-    0.53      11.5 +/-    0.53  0.090 / 0.110