PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-14:57:40
G02     215.0          54.8                9.8 +/-    1.15      11.7 +/-    1.15  0.060 / 0.080
G06     63.5           75.5                8.4 +/-    0.78       8.6 +/-    0.78  0.050 / 0.070
G12     317.2          33.6                5.5 +/-    1.08       9.0 +/-    1.08  0.060 / 0.060
G17     52.9           36.5                7.5 +/-    0.86      11.6 +/-    0.86  0.040 / 0.060
G19     38.0           49.3                6.4 +/-    1.24       8.1 +/-    1.24  0.050 / 0.040
G24     269.7          41.5                9.8 +/-    1.95      14.0 +/-    1.95  0.040 / 0.050
G28     118.9          21.4                7.7 +/-    1.37      16.3 +/-    1.37  0.030 / 0.030