PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-14:42:50
G02     219.9          58.8                6.7 +/-    0.46       7.7 +/-    0.46  0.030 / 0.040
G06     50.3           70.3                7.0 +/-    0.49       7.3 +/-    0.49  0.030 / 0.040
G12     320.5          42.5                5.6 +/-    1.29       7.8 +/-    1.29  0.090 / 0.650
G17     60.9           29.0                4.4 +/-    1.43       7.9 +/-    1.43  0.080 / 0.530
G19     37.7           50.7                5.4 +/-    0.61       6.7 +/-    0.61  0.060 / 0.140
G24     257.7          41.0                7.0 +/-    2.24      10.0 +/-    2.24  0.060 / 0.120
G28     124.5          11.9                6.4 +/-    3.15      17.2 +/-    3.15  0.050 / 0.060