PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/08-12:42:50
G02     201.9          23.0                2.4 +/-    1.61       5.0 +/-    1.61  0.090 / 0.110
G06     165.9          59.8                5.0 +/-    1.16       5.7 +/-    1.16  0.090 / 0.120
G17     23.9           58.1                3.0 +/-    0.43       3.4 +/-    0.43  0.050 / 0.090
G19     343.6          69.6                3.5 +/-    0.68       3.7 +/-    0.68  0.040 / 0.090
G24     306.9          31.8                5.1 +/-    1.90       8.5 +/-    1.90  0.030 / 0.040
G28     88.4           42.7                4.0 +/-    0.65       5.6 +/-    0.65  0.030 / 0.040
G30     157.9          11.1                3.4 +/-    1.63       9.3 +/-    1.63  0.040 / 0.040