PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-11:42:40
G01     105.8          26.0                6.0 +/-    1.28      11.4 +/-    1.28  0.110 / 0.220
G07     109.6          54.9                6.8 +/-    0.44       8.1 +/-    0.44  0.160 / 0.200
G08     41.7           17.7                4.3 +/-    2.10      10.0 +/-    2.10  0.030 / 0.020
G09     173.1          10.8                4.6 +/-    6.26      12.5 +/-    6.26  0.030 / 0.020
G11     85.4           41.0                5.9 +/-    1.31       8.5 +/-    1.31  0.030 / 0.030
G17     205.7          41.5                8.0 +/-    1.36      11.4 +/-    1.36  0.030 / 0.030
G19     209.1          15.5                7.1 +/-    2.25      17.5 +/-    2.25  0.100 / 0.140
G28     320.8          61.1                4.1 +/-    0.56       4.7 +/-    0.56  0.100 / 0.140
G30     20.2           77.8                6.4 +/-    0.83       6.5 +/-    0.83  0.040 / 0.080