PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-20:27:40
G06     181.1          13.7               15.5 +/-   17.96      39.7 +/-   17.96  0.050 / 0.050
G07     141.9          15.5               13.0 +/-    3.17      32.1 +/-    3.17  0.060 / 0.040
G11     47.1           22.2               10.4 +/-    2.63      21.6 +/-    2.63  0.190 / 0.390
G13     260.3          35.5               17.0 +/-    1.84      26.7 +/-    1.84  0.140 / 0.380
G15     292.0          16.6               12.6 +/-    1.29      30.1 +/-    1.29  0.070 / 0.110
G17     263.7          77.7               15.2 +/-    0.56      15.5 +/-    0.56  0.070 / 0.120
G18     40.3           10.7                7.9 +/-    4.70      21.8 +/-    4.70  0.070 / 0.070
G19     233.0          52.0               16.1 +/-    2.32      19.8 +/-    2.32  0.080 / 0.100
G28     29.8           58.5               11.9 +/-    0.63      13.7 +/-    0.63  0.110 / 0.310
G30     144.1          49.4               14.5 +/-    0.67      18.4 +/-    0.67  0.110 / 0.340