PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:28:10
G02     199.2          12.4               19.8 +/-    2.14      52.4 +/-    2.14  0.130 / 0.200
G06     175.7          41.5               15.6 +/-    0.99      22.2 +/-    0.99  0.100 / 0.200
G13     233.1          19.5               17.1 +/-    1.25      38.0 +/-    1.25  0.110 / 0.180
G15     266.1          10.7               15.2 +/-    1.38      41.8 +/-    1.38  0.090 / 0.170
G17     10.9           66.7               13.3 +/-    0.67      14.4 +/-    0.67  0.090 / 0.280
G19     291.3          71.0               14.1 +/-    0.60      14.8 +/-    0.60  0.100 / 0.270
G24     314.3          23.6               11.1 +/-    1.07      22.3 +/-    1.07  0.040 / 0.040
G28     73.0           48.1               12.0 +/-    0.44      15.5 +/-    0.44  0.040 / 0.050
G30     155.1          21.6               14.1 +/-    1.76      29.7 +/-    1.76  0.070 / 0.380