PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-18:12:50
G01     121.0          16.5               15.1 +/-    1.41      36.3 +/-    1.41  0.040 / 0.070
G07     73.8           67.9               13.2 +/-    0.68      14.2 +/-    0.68  0.040 / 0.080
G08     46.9           35.8               12.1 +/-    0.64      18.9 +/-    0.64  0.110 / 0.230
G09     177.5          28.4               13.3 +/-    1.30      24.1 +/-    1.30  0.090 / 0.200
G11     111.0          39.0               15.5 +/-    1.00      23.0 +/-    1.00  0.040 / 0.100
G13     318.7          17.5                9.5 +/-    1.16      22.2 +/-    1.16  0.040 / 0.080
G17     202.3          19.3               14.6 +/-    1.52      32.6 +/-    1.52  0.050 / 0.070
G18     97.0           20.0               14.1 +/-    1.25      31.0 +/-    1.25  0.040 / 0.060
G28     289.2          56.6               13.3 +/-    0.74      15.6 +/-    0.74  0.030 / 0.050
G30     345.1          67.5               11.7 +/-    0.65      12.5 +/-    0.65  0.030 / 0.040