PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/24-11:58:00
G01     123.0          14.7                4.7 +/-    2.06      11.7 +/-    2.06  0.030 / 0.030
G07     72.5           66.4                4.9 +/-    0.61       5.3 +/-    0.61  0.030 / 0.020
G08     46.7           33.8                4.2 +/-    1.43       6.9 +/-    1.43  0.070 / 0.110
G09     175.4          28.5                5.8 +/-    2.50      10.5 +/-    2.50  0.070 / 0.120
G11     110.2          36.5                6.4 +/-    0.54       9.9 +/-    0.54  0.040 / 0.030
G13     320.6          13.5                1.9 +/-    3.27       4.8 +/-    3.27  0.030 / 0.030
G17     199.9          21.9                6.3 +/-    1.27      13.2 +/-    1.27  0.130 / 0.190
G28     284.6          55.3                4.9 +/-    2.59       5.8 +/-    2.59  0.150 / 0.250
G30     336.4          62.7                4.3 +/-    0.37       4.7 +/-    0.37  0.060 / 0.080