PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-15:13:00
G02     201.0          19.2                7.6 +/-    1.33      17.1 +/-    1.33  0.050 / 0.080
G06     169.2          54.6                8.8 +/-    0.86      10.5 +/-    0.86  0.060 / 0.080
G13     225.6          13.1                7.6 +/-    5.29      19.7 +/-    5.29  0.230 / 0.370
G17     16.8           62.3                6.3 +/-    0.72       7.0 +/-    0.72  0.190 / 0.240
G19     328.9          71.3                5.7 +/-    0.95       6.0 +/-    0.95  0.030 / 0.040
G24     309.8          29.3              -12.6 +/-   28.45     -22.4 +/-   28.45  0.040 / 0.030
G28     83.7           44.6                7.4 +/-    0.89      10.1 +/-    0.89  0.040 / 0.030
G30     157.0          13.7                6.7 +/-    2.06      17.3 +/-    2.06  0.040 / 0.030