PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-12:28:00
G02     203.6          31.5                3.5 +/-    1.72       5.9 +/-    1.72  0.060 / 0.080
G06     157.6          68.5                5.3 +/-    0.60       5.7 +/-    0.60  0.080 / 0.080
G12     306.5          15.2                2.6 +/-    3.01       6.5 +/-    3.01  0.030 / 0.040
G17     32.7           51.7                4.3 +/-    1.56       5.3 +/-    1.56  0.030 / 0.040
G19     3.3            65.1                4.4 +/-    0.73       4.8 +/-    0.73  0.040 / 0.030
G24     299.7          36.5                4.3 +/-    3.75       6.7 +/-    3.75  0.040 / 0.030
G28     97.4           38.0                3.9 +/-    1.18       5.8 +/-    1.18  0.110 / 0.140