PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-23:42:30
G02     227.1          70.3               15.9 +/-    0.93      16.7 +/-    0.93  0.060 / 0.070
G05     173.7          10.7                1.8 +/-   42.70       5.1 +/-   42.70  0.060 / 0.060
G06     44.3           68.8               14.1 +/-    0.52      15.0 +/-    0.52  0.060 / 0.080
G12     319.9          42.0               13.5 +/-    1.73      19.0 +/-    1.73  0.060 / 0.080
G17     65.0           25.9               13.0 +/-    0.86      24.9 +/-    0.86  0.160 / 0.350
G19     49.6           42.8               13.1 +/-    1.02      18.3 +/-    1.02  0.190 / 0.430
G24     251.9          38.3               17.3 +/-    1.14      25.9 +/-    1.14  0.030 / 0.040
G28     127.3          10.5               17.1 +/-    3.41      47.3 +/-    3.41  0.040 / 0.040