PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-11:57:50
G01     78.4           33.1                3.3 +/-    0.82       5.5 +/-    0.82  0.040 / 0.080
G07     133.2          34.7                4.1 +/-    1.00       6.5 +/-    1.00  0.050 / 0.070
G11     58.0           32.9                2.6 +/-    0.48       4.3 +/-    0.48  0.120 / 0.230
G13     285.3          36.7                4.6 +/-    1.26       7.1 +/-    1.26  0.120 / 0.170
G15     309.4          13.0                1.9 +/-    0.90       5.1 +/-    0.90  0.030 / 0.030
G17     224.1          65.7                6.0 +/-    1.06       6.5 +/-    1.06  0.030 / 0.030
G19     219.7          37.8                7.3 +/-    2.08      11.0 +/-    2.08  0.040 / 0.040
G28     8.4            60.4                3.5 +/-    0.60       3.9 +/-    0.60  0.030 / 0.050
G30     125.2          69.5                4.4 +/-    0.48       4.7 +/-    0.48  0.060 / 0.100