PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-04:58:00
G03     191.3          19.5                4.2 +/-    2.08       9.3 +/-    2.08  0.030 / 0.030
G07     294.3          40.2                2.3 +/-    1.81       3.3 +/-    1.81  0.030 / 0.040
G08     137.6          31.1                7.2 +/-    0.80      12.4 +/-    0.80  0.050 / 0.060
G09     320.1          66.9                1.9 +/-    0.75       2.1 +/-    0.75  0.060 / 0.060
G16     42.5           41.4                3.4 +/-    0.70       4.8 +/-    0.70  0.030 / 0.030
G23     122.2          78.5                2.9 +/-    0.72       3.0 +/-    0.72  0.030 / 0.030
G26     43.9           13.3                1.0 +/-    1.53       2.7 +/-    1.53  0.060 / 0.070
G27     94.2           34.7                5.3 +/-    0.53       8.5 +/-    0.53  0.050 / 0.080
G30     275.8          14.2                5.6 +/-    1.69      14.3 +/-    1.69  0.090 / 0.120