PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-11:43:00
G01     93.5           30.8                3.6 +/-    0.80       6.2 +/-    0.80  0.060 / 0.140
G11     71.0           39.0                3.9 +/-    0.53       5.8 +/-    0.53  0.070 / 0.100
G13     300.1          33.4                5.7 +/-    1.11       9.4 +/-    1.11  0.030 / 0.030
G17     211.9          53.1                8.8 +/-    1.22      10.7 +/-    1.22  0.030 / 0.030
G19     213.1          25.9                8.1 +/-    3.86      15.5 +/-    3.86  0.040 / 0.050
G28     343.8          61.7                3.5 +/-    0.72       4.0 +/-    0.72  0.040 / 0.050
G30     84.5           78.9                4.3 +/-    0.68       4.4 +/-    0.68  0.040 / 0.060