PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:12:40
G01     225.8          17.3                5.2 +/-    2.84      12.1 +/-    2.84  0.040 / 0.040
G03     277.1          71.9                8.4 +/-    1.10       8.8 +/-    1.10  0.040 / 0.040
G14     86.3           23.8                6.7 +/-    1.00      13.4 +/-    1.00  0.100 / 0.240
G16     150.8          42.5                9.8 +/-    0.93      13.7 +/-    0.93  0.110 / 0.240
G22     204.6          68.7                9.2 +/-    0.68       9.8 +/-    0.68  0.040 / 0.050
G23     307.3          37.4                5.1 +/-    1.21       7.7 +/-    1.21  0.030 / 0.050
G26     102.5          54.7                8.4 +/-    0.76      10.1 +/-    0.76  0.040 / 0.070
G31     45.2           33.0                5.3 +/-    1.02       8.7 +/-    1.02  0.040 / 0.080
G32     97.3           10.1                6.4 +/-    2.20      17.7 +/-    2.20  0.090 / 0.200