PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-06:57:50
G08     313.3          16.4                4.7 +/-    2.13      11.4 +/-    2.13  0.040 / 0.050
G10     327.9          59.3                4.2 +/-    0.66       4.8 +/-    0.66  0.030 / 0.050
G14     217.6          24.3                6.3 +/-    1.30      12.6 +/-    1.30  0.120 / 0.310
G15     46.5           12.3                2.1 +/-    2.38       5.6 +/-    2.38  0.120 / 0.320
G20     60.4           47.3                3.9 +/-    0.66       5.1 +/-    0.66  0.140 / 0.300
G21     132.1          59.4                8.6 +/-    0.68       9.9 +/-    0.68  0.130 / 0.220
G24     76.0           30.0                4.9 +/-    0.68       8.7 +/-    0.68  0.030 / 0.030
G27     277.0          37.7                7.6 +/-    1.02      11.5 +/-    1.02  0.030 / 0.060
G32     221.6          52.2                9.3 +/-    1.63      11.4 +/-    1.63  0.060 / 0.080