PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-13:28:00
G01     78.3           33.0                6.7 +/-    0.60      11.1 +/-    0.60  0.030 / 0.030
G07     133.2          34.1                7.3 +/-    1.65      11.8 +/-    1.65  0.030 / 0.030
G11     57.7           32.5                5.2 +/-    1.24       8.6 +/-    1.24  0.050 / 0.080
G13     285.3          36.7                6.8 +/-    1.21      10.4 +/-    1.21  0.050 / 0.070
G15     310.0          12.6                4.4 +/-    1.43      11.7 +/-    1.43  0.060 / 0.110
G17     224.1          65.9                7.8 +/-    1.45       8.5 +/-    1.45  0.060 / 0.100
G19     219.7          37.9                8.6 +/-    1.70      13.0 +/-    1.70  0.040 / 0.040
G28     8.2            60.4                6.0 +/-    0.80       6.7 +/-    0.80  0.040 / 0.040
G30     124.9          70.0                6.2 +/-    0.32       6.5 +/-    0.32  0.050 / 0.090