PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-20:42:50
G01     63.3           31.3               13.1 +/-    1.00      22.3 +/-    1.00  0.120 / 0.210
G07     140.0          19.6               15.7 +/-    3.10      34.9 +/-    3.10  0.110 / 0.210
G11     49.1           25.6               13.0 +/-    2.44      25.1 +/-    2.44  0.080 / 0.120
G13     265.8          37.0               14.9 +/-    1.70      22.8 +/-    1.70  0.070 / 0.140
G15     296.2          16.4               11.4 +/-    2.18      27.5 +/-    2.18  0.070 / 0.080
G17     247.4          75.0               14.9 +/-    0.26      15.4 +/-    0.26  0.070 / 0.090
G18     42.9           13.4               10.4 +/-    1.74      26.9 +/-    1.74  0.100 / 0.070
G19     228.6          47.9               15.2 +/-    2.41      19.7 +/-    2.41  0.070 / 0.080
G28     22.1           59.5               12.5 +/-    0.98      14.2 +/-    0.98  0.040 / 0.040
G30     141.0          54.1               14.8 +/-    0.60      17.9 +/-    0.60  0.040 / 0.040