PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/12-14:43:00
G01     71.4           32.5                9.4 +/-    1.68      15.6 +/-    1.68  0.040 / 0.050
G07     136.2          28.4               10.1 +/-    1.33      18.3 +/-    1.33  0.050 / 0.050
G11     54.2           32.1                8.2 +/-    1.47      13.8 +/-    1.47  0.110 / 0.130
G13     275.0          38.7               10.0 +/-    0.96      14.8 +/-    0.96  0.090 / 0.090
G15     303.5          15.0                7.0 +/-    1.71      17.4 +/-    1.71  0.070 / 0.110
G17     228.7          65.0               11.8 +/-    1.30      12.8 +/-    1.30  0.080 / 0.100
G18     49.1           18.3                7.9 +/-    2.58      18.0 +/-    2.58  0.070 / 0.050
G19     222.3          42.1               10.9 +/-    1.78      15.3 +/-    1.78  0.030 / 0.040
G28     4.9            61.1               10.9 +/-    0.68      12.3 +/-    0.68  0.110 / 0.080
G30     134.3          61.6               10.4 +/-    0.40      11.7 +/-    0.40  0.110 / 0.070