PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-18:57:50
G01     75.8           32.9               11.4 +/-    1.29      18.8 +/-    1.29  0.040 / 0.040
G07     134.4          29.0               13.6 +/-    1.66      24.4 +/-    1.66  0.030 / 0.040
G11     56.1           33.4               10.2 +/-    2.60      16.7 +/-    2.60  0.070 / 0.100
G13     279.6          38.7                9.9 +/-    1.39      14.7 +/-    1.39  0.070 / 0.110
G15     305.8          14.6                7.1 +/-    1.78      17.8 +/-    1.78  0.030 / 0.040
G17     224.8          64.9               13.9 +/-    1.00      15.2 +/-    1.00  0.040 / 0.050
G18     51.2           19.3               10.5 +/-    1.78      23.6 +/-    1.78  0.060 / 0.110
G19     220.1          38.2               12.4 +/-    2.17      18.6 +/-    2.17  0.070 / 0.090
G28     1.1            61.3               11.0 +/-    1.05      12.4 +/-    1.05  0.090 / 0.160
G30     130.4          63.8               13.4 +/-    0.41      14.8 +/-    0.41  0.080 / 0.210