PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-12:27:40
G07     40.1           69.7                4.2 +/-    0.84       4.5 +/-    0.84  0.030 / 0.030
G08     53.2           41.7                3.7 +/-    1.02       5.2 +/-    1.02  0.030 / 0.040
G09     177.0          38.6                4.0 +/-    0.82       5.9 +/-    0.82  0.030 / 0.030
G11     121.6          33.0                4.6 +/-    1.19       7.6 +/-    1.19  0.040 / 0.030
G17     199.3          11.4               -3.9 +/-   16.37     -10.5 +/-   16.37  0.140 / 0.210
G18     107.1          14.6                4.8 +/-    1.49      12.1 +/-    1.49  0.080 / 0.350
G23     160.5          11.0                2.5 +/-    2.18       6.9 +/-    2.18  0.200 / 0.420
G27     37.9           10.6                4.5 +/-    3.64      12.3 +/-    3.64  0.200 / 0.360
G28     269.9          50.5                3.6 +/-    2.60       4.5 +/-    2.60  0.170 / 0.420
G30     327.1          56.2                3.4 +/-    0.43       4.0 +/-    0.43  0.150 / 0.350