PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:27:50
G01     97.7           29.2               11.4 +/-    0.78      20.3 +/-    0.78  0.040 / 0.050
G07     120.1          45.2               13.8 +/-    0.87      18.5 +/-    0.87  0.050 / 0.060
G08     41.6           12.7                8.5 +/-    2.66      22.5 +/-    2.66  0.040 / 0.060
G11     75.6           41.9               12.6 +/-    0.63      17.7 +/-    0.63  0.040 / 0.070
G13     301.6          34.1               11.8 +/-    1.25      19.1 +/-    1.25  0.030 / 0.030
G17     208.9          47.0               13.0 +/-    2.02      17.1 +/-    2.02  0.030 / 0.030
G18     68.9           23.9               11.0 +/-    0.90      22.0 +/-    0.90  0.060 / 0.120
G19     211.1          20.9               11.1 +/-    1.84      23.8 +/-    1.84  0.060 / 0.140
G28     325.3          60.9               10.5 +/-    0.98      11.8 +/-    0.98  0.060 / 0.200
G30     79.2           78.6               11.3 +/-    0.59      11.5 +/-    0.59  0.080 / 0.160