PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-00:57:30
G02     199.2          18.5               17.6 +/-    3.11      40.3 +/-    3.11  0.040 / 0.070
G06     173.2          48.9               14.9 +/-    0.73      19.1 +/-    0.73  0.050 / 0.080
G13     230.7          15.8               16.5 +/-    2.79      40.2 +/-    2.79  0.030 / 0.040
G17     10.9           65.3               10.5 +/-    0.66      11.4 +/-    0.66  0.030 / 0.040
G19     308.2          71.3               10.7 +/-    0.51      11.3 +/-    0.51  0.040 / 0.030
G24     312.7          26.3               10.2 +/-    1.32      19.4 +/-    1.32  0.030 / 0.030
G28     83.8           41.5               11.7 +/-    0.87      16.6 +/-    0.87  0.240 / 0.230
G30     155.7          16.0               15.9 +/-    1.51      38.5 +/-    1.51  0.270 / 0.390