PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-03:28:00
G07     357.7          65.0                3.5 +/-    1.09       3.8 +/-    1.09  0.060 / 0.100
G08     75.0           51.3                5.7 +/-    0.67       7.1 +/-    0.67  0.060 / 0.110
G09     182.3          59.3                7.7 +/-    0.93       8.8 +/-    0.93  0.040 / 0.040
G11     136.9          21.4                5.7 +/-    1.14      12.1 +/-    1.14  0.030 / 0.040
G23     159.2          28.5                7.4 +/-    0.91      13.4 +/-    0.91  0.030 / 0.040
G27     44.1           22.4                3.0 +/-    2.09       6.2 +/-    2.09  0.030 / 0.050
G28     250.2          40.5                6.3 +/-    1.59       9.0 +/-    1.59  0.050 / 0.040
G30     314.3          45.7                3.4 +/-    1.00       4.6 +/-    1.00  0.070 / 0.040