PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-20:57:50
G01     225.1          18.4                8.3 +/-    6.63      18.9 +/-    6.63  0.030 / 0.030
G03     295.6          65.3                8.5 +/-    1.02       9.3 +/-    1.02  0.040 / 0.030
G14     81.8           29.2                9.8 +/-    2.21      17.4 +/-    2.21  0.080 / 0.130
G16     146.1          42.7                9.7 +/-    0.68      13.5 +/-    0.68  0.110 / 0.170
G22     226.9          72.2                8.6 +/-    0.45       9.0 +/-    0.45  0.050 / 0.080
G23     305.2          35.2                8.2 +/-    1.51      13.0 +/-    1.51  0.060 / 0.090
G26     102.7          53.6                8.4 +/-    0.94      10.1 +/-    0.94  0.040 / 0.040
G31     44.5           34.9                6.7 +/-    1.28      10.7 +/-    1.28  0.040 / 0.040