PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-14:43:00
G01     60.6           30.3                8.0 +/-    0.87      14.0 +/-    0.87  0.190 / 0.190
G07     141.0          20.0                7.7 +/-    2.96      16.9 +/-    2.96  0.190 / 0.240
G11     48.6           25.2                7.2 +/-    2.07      14.0 +/-    2.07  0.040 / 0.040
G13     262.9          36.6               10.3 +/-    2.42      15.9 +/-    2.42  0.040 / 0.040
G15     294.9          16.3                7.8 +/-    1.26      18.9 +/-    1.26  0.130 / 0.190
G17     247.5          72.8               10.4 +/-    0.83      10.8 +/-    0.83  0.080 / 0.190
G18     42.3           13.1                5.3 +/-    2.35      13.8 +/-    2.35  0.030 / 0.040
G19     230.5          50.9               11.5 +/-    2.69      14.4 +/-    2.69  0.030 / 0.030
G28     22.6           59.7                9.2 +/-    0.97      10.5 +/-    0.97  0.110 / 0.110
G30     142.7          52.4                9.1 +/-    0.54      11.1 +/-    0.54  0.060 / 0.100