PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-16:57:50
G03     214.1          61.7                9.4 +/-    1.21      10.6 +/-    1.21  0.040 / 0.050
G07     254.4          16.2               10.8 +/-    1.86      26.0 +/-    1.86  0.040 / 0.050
G09     307.4          23.4                7.3 +/-    2.04      14.8 +/-    2.04  0.050 / 0.080
G16     122.8          63.0               10.0 +/-    0.64      11.1 +/-    0.64  0.050 / 0.060
G22     187.9          44.8                8.7 +/-    1.62      11.7 +/-    1.62  0.040 / 0.070
G23     324.5          54.5                8.1 +/-    1.31       9.7 +/-    1.31  0.040 / 0.060
G26     62.9           50.8                8.7 +/-    0.54      10.9 +/-    0.54  0.130 / 0.200
G31     55.8           15.8                6.4 +/-    1.61      15.7 +/-    1.61  0.070 / 0.250