PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-14:27:50
G01     72.9           32.6                4.9 +/-    1.38       8.2 +/-    1.38  0.040 / 0.050
G07     135.5          29.7                7.9 +/-    1.22      14.0 +/-    1.22  0.040 / 0.060
G11     55.2           33.0                4.9 +/-    1.28       8.0 +/-    1.28  0.060 / 0.110
G13     276.7          38.8                8.5 +/-    1.53      12.6 +/-    1.53  0.110 / 0.120
G15     304.6          14.7                5.0 +/-    1.58      12.4 +/-    1.58  0.070 / 0.090
G17     226.9          63.6                9.6 +/-    0.93      10.6 +/-    0.93  0.060 / 0.090
G18     50.2           18.9                5.0 +/-    1.52      11.4 +/-    1.52  0.060 / 0.040
G19     221.3          41.0               10.4 +/-    1.64      14.9 +/-    1.64  0.050 / 0.050
G28     2.3            61.3                7.5 +/-    1.11       8.5 +/-    1.11  0.070 / 0.110
G30     132.8          63.0                8.0 +/-    0.47       8.9 +/-    0.47  0.070 / 0.130