PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-11:42:50
G02     201.7          24.5                3.3 +/-    3.35       6.6 +/-    3.35  0.200 / 0.230
G06     165.3          60.6                6.7 +/-    1.17       7.6 +/-    1.17  0.220 / 0.330
G17     25.5           57.0                3.6 +/-    0.51       4.2 +/-    0.51  0.080 / 0.110
G19     345.7          69.3                3.8 +/-    0.43       4.0 +/-    0.43  0.080 / 0.100
G24     306.5          32.1                6.1 +/-    3.01      10.3 +/-    3.01  0.040 / 0.040
G28     89.0           42.6                4.6 +/-    0.70       6.5 +/-    0.70  0.030 / 0.030
G30     158.2          11.0                3.6 +/-    4.53       9.8 +/-    4.53  0.040 / 0.040