PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-19:27:40
G01     79.7           32.8               11.6 +/-    0.46      19.1 +/-    0.46  0.030 / 0.040
G07     132.4          31.6               14.1 +/-    1.21      23.9 +/-    1.21  0.040 / 0.050
G11     58.8           35.3               12.7 +/-    0.91      20.1 +/-    0.91  0.050 / 0.090
G13     283.7          38.5               15.4 +/-    3.52      23.0 +/-    3.52  0.060 / 0.100
G15     308.4          13.6                9.9 +/-    1.82      25.4 +/-    1.82  0.030 / 0.030
G17     221.0          62.1               15.5 +/-    1.63      17.3 +/-    1.63  0.030 / 0.030
G18     53.9           20.5               10.5 +/-    3.61      22.9 +/-    3.61  0.060 / 0.080
G19     218.2          35.1               15.7 +/-    2.02      24.8 +/-    2.02  0.070 / 0.120
G28     355.3          61.5               12.5 +/-    0.68      14.0 +/-    0.68  0.100 / 0.260
G30     125.8          67.2               14.1 +/-    0.39      15.1 +/-    0.39  0.080 / 0.220