PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-11:57:20
G02     203.2          31.4                4.7 +/-    1.82       7.9 +/-    1.82  0.110 / 0.100
G06     158.4          67.9                5.6 +/-    0.54       6.0 +/-    0.54  0.110 / 0.090
G12     306.3          15.0                2.8 +/-    2.41       7.0 +/-    2.41  0.040 / 0.040
G17     32.4           51.9                4.5 +/-    1.60       5.6 +/-    1.60  0.060 / 0.040
G19     2.1            65.5                3.8 +/-    0.69       4.1 +/-    0.69  0.040 / 0.030
G24     300.4          36.1                7.3 +/-    0.99      11.3 +/-    0.99  0.040 / 0.030
G28     96.7           38.5                5.9 +/-    0.91       8.8 +/-    0.91  0.030 / 0.030