PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-08:28:10
G08     312.2          16.7                5.4 +/-    1.21      12.8 +/-    1.21  0.250 / 0.220
G10     332.1          60.0                5.5 +/-    0.65       6.3 +/-    0.65  0.160 / 0.240
G14     218.6          27.2                5.5 +/-    1.15      10.1 +/-    1.15  0.050 / 0.060
G15     46.9           10.0                2.6 +/-    2.53       7.2 +/-    2.53  0.050 / 0.080
G20     71.7           35.5                6.0 +/-    1.13       9.4 +/-    1.13  0.050 / 0.070
G21     134.5          56.8                7.8 +/-    0.30       9.2 +/-    0.30  0.050 / 0.070
G24     73.6           30.0                7.3 +/-    0.85      12.7 +/-    0.85  0.070 / 0.090
G27     273.8          37.4                7.7 +/-    2.51      11.7 +/-    2.51  0.070 / 0.080
G32     223.6          54.3                9.1 +/-    2.00      10.9 +/-    2.00  0.050 / 0.040