PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-12:12:30
G02     203.7          32.4                4.2 +/-    1.65       7.0 +/-    1.65  0.080 / 0.110
G06     156.6          69.2                5.1 +/-    0.39       5.4 +/-    0.39  0.100 / 0.080
G12     306.9          15.8                2.0 +/-    2.72       4.9 +/-    2.72  0.040 / 0.040
G17     33.5           51.1                3.6 +/-    1.18       4.5 +/-    1.18  0.030 / 0.040
G19     4.6            64.7                3.7 +/-    0.69       4.0 +/-    0.69  0.030 / 0.030
G24     299.1          36.8                3.5 +/-    3.49       5.4 +/-    3.49  0.040 / 0.030
G28     98.0           37.7                4.7 +/-    0.82       7.1 +/-    0.82  0.130 / 0.150