PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-21:57:40
G01     40.3           15.4                9.5 +/-    2.53      23.5 +/-    2.53  0.350 / 0.280
G06     176.8          37.3               12.5 +/-    1.44      19.0 +/-    1.44  0.130 / 0.270
G13     236.0          21.9               12.6 +/-    2.03      26.5 +/-    2.03  0.050 / 0.070
G15     269.3          12.0               11.8 +/-    2.95      31.5 +/-    2.95  0.050 / 0.050
G17     5.6            69.4               11.0 +/-    0.38      11.6 +/-    0.38  0.080 / 0.170
G19     279.4          69.7               10.2 +/-    0.66      10.8 +/-    0.66  0.130 / 0.280
G24     315.7          20.9                7.8 +/-    4.47      16.8 +/-    4.47  0.030 / 0.020
G28     68.3           49.6               10.6 +/-    0.82      13.4 +/-    0.82  0.030 / 0.030
G30     154.4          25.4               11.8 +/-    1.14      22.8 +/-    1.14  0.100 / 0.130