PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/22-12:27:50
G01     87.3           32.3                2.6 +/-    2.50       4.3 +/-    2.50  0.020 / 0.020
G07     127.7          43.2                4.5 +/-    0.99       6.2 +/-    0.99  0.020 / 0.060
G11     64.6           37.8                4.0 +/-    0.84       6.1 +/-    0.84  0.050 / 0.050
G13     291.4          36.9                7.1 +/-    1.81      10.8 +/-    1.81  0.050 / 0.040
G17     216.0          57.8                4.8 +/-    0.95       5.5 +/-    0.95  0.090 / 0.080
G18     60.7           23.0                2.8 +/-    2.64       5.8 +/-    2.64  0.060 / 0.080
G19     215.9          25.8                4.0 +/-    1.53       7.7 +/-    1.53  0.060 / 0.110
G28     353.3          61.6                2.9 +/-    0.72       3.2 +/-    0.72  0.060 / 0.100
G30     108.9          76.1                4.0 +/-    0.75       4.1 +/-    0.75  0.090 / 0.130