PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-13:27:50
G01     81.2           32.4                5.1 +/-    1.01       8.5 +/-    1.01  0.040 / 0.060
G07     130.9          36.3                6.8 +/-    0.99      10.5 +/-    0.99  0.050 / 0.060
G11     61.4           37.5                8.0 +/-    0.84      12.2 +/-    0.84  0.050 / 0.080
G13     285.7          38.6                4.6 +/-    2.38       6.8 +/-    2.38  0.040 / 0.060
G15     310.6          12.5                5.9 +/-    1.89      15.7 +/-    1.89  0.050 / 0.050
G17     219.1          56.3                9.4 +/-    1.14      11.1 +/-    1.14  0.050 / 0.060
G18     56.4           21.8                5.8 +/-    2.04      12.3 +/-    2.04  0.080 / 0.130
G19     216.9          34.6                9.2 +/-    1.17      14.8 +/-    1.17  0.140 / 0.110
G28     348.2          61.6                6.1 +/-    0.53       6.8 +/-    0.53  0.140 / 0.270
G30     122.3          70.1                8.3 +/-    1.07       8.7 +/-    1.07  0.160 / 0.320