PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-07:43:10
G01     65.4           32.0                4.9 +/-    0.75       8.3 +/-    0.75  0.050 / 0.040
G07     139.9          25.9                7.0 +/-    2.15      13.3 +/-    2.15  0.060 / 0.040
G11     50.9           27.0                2.9 +/-    2.82       5.5 +/-    2.82  0.080 / 0.100
G13     270.4          36.3                6.2 +/-    1.56       9.6 +/-    1.56  0.090 / 0.100
G15     298.2          16.3                4.7 +/-    2.14      11.3 +/-    2.14  0.030 / 0.020
G17     245.9          74.5                7.4 +/-    0.50       7.6 +/-    0.50  0.030 / 0.020
G19     228.3          47.8                6.4 +/-    2.06       8.3 +/-    2.06  0.100 / 0.280
G28     28.8           57.8                6.3 +/-    2.25       7.3 +/-    2.25  0.110 / 0.250
G30     139.4          56.5                8.7 +/-    0.70      10.3 +/-    0.70  0.040 / 0.070