PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-23:42:50
G02     211.6          55.3               14.4 +/-    0.66      17.2 +/-    0.66  0.060 / 0.060
G06     94.3           80.8               11.4 +/-    0.76      11.5 +/-    0.76  0.070 / 0.070
G12     315.4          28.4                8.0 +/-    1.34      14.5 +/-    1.34  0.070 / 0.110
G17     53.0           35.1                9.8 +/-    1.63      15.5 +/-    1.63  0.070 / 0.120
G19     32.3           52.7               10.1 +/-    1.06      12.3 +/-    1.06  0.040 / 0.050
G24     271.3          42.7               12.5 +/-    2.20      17.4 +/-    2.20  0.040 / 0.040
G28     117.2          21.6               12.0 +/-    0.88      25.4 +/-    0.88  0.080 / 0.180