PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-13:58:00
G01     85.1           32.0                6.9 +/-    1.68      11.6 +/-    1.68  0.040 / 0.060
G07     128.6          38.8                8.5 +/-    0.61      12.5 +/-    0.61  0.050 / 0.060
G11     64.5           39.0                7.4 +/-    1.72      11.0 +/-    1.72  0.030 / 0.050
G13     289.7          38.0                7.7 +/-    2.79      11.5 +/-    2.79  0.040 / 0.050
G15     312.9          11.4                3.9 +/-    3.70      10.5 +/-    3.70  0.050 / 0.100
G17     216.4          53.6               10.0 +/-    1.09      12.1 +/-    1.09  0.040 / 0.100
G18     59.4           22.7                5.8 +/-    2.53      11.9 +/-    2.53  0.040 / 0.060
G19     215.2          31.5                7.1 +/-    1.42      12.1 +/-    1.42  0.030 / 0.050
G28     342.3          61.5                7.1 +/-    0.60       8.0 +/-    0.60  0.110 / 0.100
G30     115.8          72.4                8.7 +/-    0.85       9.1 +/-    0.85  0.110 / 0.140