PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-20:12:50
G01     64.0           31.5               26.1 +/-    1.19      44.4 +/-    1.19  0.050 / 0.050
G07     139.7          19.9               14.0 +/-    3.13      30.9 +/-    3.13  0.050 / 0.050
G11     49.4           26.1               10.8 +/-    2.88      20.6 +/-    2.88  0.110 / 0.240
G13     266.5          37.2               15.3 +/-    1.63      23.3 +/-    1.63  0.130 / 0.230
G15     296.8          16.4               11.7 +/-    2.25      28.2 +/-    2.25  0.040 / 0.040
G17     245.2          74.3               15.6 +/-    0.40      16.1 +/-    0.40  0.040 / 0.040
G18     43.4           13.9                8.9 +/-    2.57      22.7 +/-    2.57  0.080 / 0.100
G19     228.0          47.4               15.6 +/-    2.32      20.3 +/-    2.32  0.080 / 0.120
G28     20.7           59.7               12.5 +/-    0.84      14.2 +/-    0.84  0.120 / 0.290
G30     140.5          54.5               14.8 +/-    0.73      17.7 +/-    0.73  0.160 / 0.330