PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-11:28:00
G03     192.3          21.1                4.4 +/-    4.15       9.5 +/-    4.15  0.030 / 0.040
G07     294.7          41.3                2.8 +/-    1.02       4.0 +/-    1.02  0.020 / 0.040
G08     137.7          30.4                4.2 +/-    2.06       7.4 +/-    2.06  0.260 / 0.450
G09     321.0          66.9                1.5 +/-    1.04       1.6 +/-    1.04  0.180 / 0.370
G16     42.3           38.1                2.3 +/-    0.69       3.5 +/-    0.69  0.050 / 0.080
G23     117.9          79.2                1.5 +/-    1.03       1.5 +/-    1.03  0.040 / 0.080
G26     43.6           11.2                3.0 +/-    1.65       8.1 +/-    1.65  0.030 / 0.050
G27     95.6           34.3                2.7 +/-    1.31       4.4 +/-    1.31  0.040 / 0.050
G30     274.0          11.8                4.7 +/-    5.47      12.6 +/-    5.47  0.060 / 0.110