PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-04:12:30
G08     290.7          23.6                9.7 +/-    1.93      19.5 +/-    1.93  0.030 / 0.040
G10     6.7            63.2                5.4 +/-    0.75       6.0 +/-    0.75  0.030 / 0.040
G14     231.2          49.0                7.9 +/-    0.93      10.1 +/-    0.93  0.120 / 0.150
G18     62.3           52.3                4.4 +/-    0.98       5.4 +/-    0.98  0.140 / 0.120
G21     146.4          39.7               10.7 +/-    0.99      15.7 +/-    0.99  0.040 / 0.090
G24     56.6           26.3                6.8 +/-    1.44      12.8 +/-    1.44  0.040 / 0.100
G27     251.7          31.0               11.4 +/-    1.61      19.5 +/-    1.61  0.060 / 0.040
G32     247.5          67.7                5.8 +/-    1.11       6.3 +/-    1.11  0.030 / 0.040