PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-03:57:40
G07     43.5           69.4                4.9 +/-    0.56       5.2 +/-    0.56  0.050 / 0.070
G08     53.2           42.0                5.5 +/-    0.65       7.8 +/-    0.65  0.040 / 0.070
G09     179.0          40.2               12.2 +/-    1.50      17.6 +/-    1.50  0.070 / 0.060
G11     122.4          32.5                8.7 +/-    1.26      14.4 +/-    1.26  0.050 / 0.060
G17     199.4          12.5                5.9 +/-    1.72      15.4 +/-    1.72  0.150 / 0.260
G23     160.9          11.4                5.5 +/-    1.47      15.0 +/-    1.47  0.220 / 0.280
G28     272.1          51.6                6.8 +/-    1.42       8.4 +/-    1.42  0.050 / 0.050
G30     331.5          59.0                4.6 +/-    0.76       5.2 +/-    0.76  0.040 / 0.040