PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-14:27:30
G03     187.3          16.9                7.0 +/-    1.01      16.5 +/-    1.01  0.060 / 0.080
G07     297.2          44.1                8.8 +/-    1.45      12.1 +/-    1.45  0.050 / 0.070
G08     139.8          29.7               12.3 +/-    1.05      21.7 +/-    1.05  0.050 / 0.040
G09     319.8          63.7                9.3 +/-    1.30      10.2 +/-    1.30  0.040 / 0.040
G16     43.0           39.0                6.4 +/-    0.63       9.4 +/-    0.63  0.060 / 0.080
G23     122.8          76.5                9.9 +/-    1.16      10.2 +/-    1.16  0.050 / 0.110
G26     44.2           11.2                7.2 +/-    2.90      19.5 +/-    2.90  0.040 / 0.040
G27     98.8           34.5               10.4 +/-    0.67      16.7 +/-    0.67  0.040 / 0.040
G30     276.4          16.1                7.7 +/-    2.14      18.7 +/-    2.14  0.050 / 0.090