PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/25-13:42:50
G01     75.1           32.6                4.6 +/-    1.14       7.7 +/-    1.14  0.040 / 0.050
G07     134.3          31.7                8.5 +/-    0.78      14.5 +/-    0.78  0.040 / 0.040
G11     56.8           34.5                7.0 +/-    1.63      11.2 +/-    1.63  0.070 / 0.090
G13     279.1          38.9                8.0 +/-    1.62      11.9 +/-    1.62  0.040 / 0.080
G15     306.4          14.1                5.2 +/-    2.58      13.1 +/-    2.58  0.050 / 0.040
G17     224.4          61.3                9.7 +/-    1.52      10.9 +/-    1.52  0.050 / 0.050
G18     51.8           19.8                5.6 +/-    2.82      12.4 +/-    2.82  0.080 / 0.100
G19     220.0          39.3                8.8 +/-    1.14      13.0 +/-    1.14  0.080 / 0.120
G28     358.3          61.4                7.9 +/-    0.74       8.8 +/-    0.74  0.170 / 0.160
G30     130.4          65.4                8.5 +/-    0.61       9.3 +/-    0.61  0.200 / 0.190