PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-14:42:50
G01     54.8           28.0                6.1 +/-    2.02      11.1 +/-    2.02  0.090 / 0.150
G06     178.4          18.8              -21.6 +/-    9.25     -49.0 +/-    9.25  0.090 / 0.160
G07     143.3          15.0                7.0 +/-    1.81      17.5 +/-    1.81  0.030 / 0.030
G11     46.3           20.8                6.6 +/-    2.56      14.3 +/-    2.56  0.030 / 0.030
G13     256.1          34.3                9.7 +/-    0.69      15.6 +/-    0.69  0.040 / 0.050
G15     289.6          16.3                5.9 +/-    1.71      14.2 +/-    1.71  0.040 / 0.050
G17     266.4          76.3               10.1 +/-    0.53      10.3 +/-    0.53  0.070 / 0.060
G19     237.1          56.0                9.8 +/-    2.68      11.6 +/-    2.68  0.120 / 0.060
G28     32.7           58.4                7.7 +/-    1.16       8.8 +/-    1.16  0.250 / 0.270
G30     146.3          46.9                8.1 +/-    1.18      10.7 +/-    1.18  0.140 / 0.220