PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-09:28:00
G07     2.2            65.5                3.1 +/-    0.52       3.4 +/-    0.52  0.030 / 0.040
G08     72.8           50.2                5.3 +/-    0.78       6.7 +/-    0.78  0.030 / 0.040
G09     178.7          56.7                7.1 +/-    2.11       8.3 +/-    2.11  0.040 / 0.040
G11     134.5          21.6                5.7 +/-    1.02      12.1 +/-    1.02  0.060 / 0.050
G23     159.5          29.3                5.6 +/-    1.29      10.0 +/-    1.29  0.060 / 0.070
G27     44.0           22.2                3.0 +/-    1.57       6.2 +/-    1.57  0.050 / 0.060
G28     250.2          40.3                5.6 +/-    1.09       8.1 +/-    1.09  0.060 / 0.120
G30     312.2          43.3                3.1 +/-    1.10       4.2 +/-    1.10  0.060 / 0.150