PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-21:12:40
G02     57.3           34.6                9.2 +/-    1.62      14.7 +/-    1.62  0.190 / 0.390
G05     60.4           62.4                9.1 +/-    0.39      10.1 +/-    0.39  0.210 / 0.370
G12     185.6          36.0               12.0 +/-    2.04      18.6 +/-    2.04  0.060 / 0.070
G13     128.2          13.7               11.7 +/-    1.89      29.9 +/-    1.89  0.070 / 0.110
G15     164.3          11.3                8.2 +/-   25.23      22.2 +/-   25.23  0.120 / 0.300
G21     269.9          15.5               11.5 +/-    2.67      28.4 +/-    2.67  0.180 / 0.400
G29     328.2          53.5               10.5 +/-    1.15      12.7 +/-    1.15  0.150 / 0.290